1 /* Buffer manipulation primitives for GNU Emacs.
2 Copyright (C) 1985,86,87,88,89,93,94,95,97,98, 1999, 2000
3 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include <sys/types.h>
26 #include <sys/param.h>
35 /* in 4.1, param.h fails to define this. */
36 #define MAXPATHLEN 1024
37 #endif /* not MAXPATHLEN */
43 #include "intervals.h"
48 #include "region-cache.h"
50 #include "blockinput.h"
54 struct buffer
*current_buffer
; /* the current buffer */
56 /* First buffer in chain of all buffers (in reverse order of creation).
57 Threaded through ->next. */
59 struct buffer
*all_buffers
;
61 /* This structure holds the default values of the buffer-local variables
62 defined with DEFVAR_PER_BUFFER, that have special slots in each buffer.
63 The default value occupies the same slot in this structure
64 as an individual buffer's value occupies in that buffer.
65 Setting the default value also goes through the alist of buffers
66 and stores into each buffer that does not say it has a local value. */
68 struct buffer buffer_defaults
;
70 /* A Lisp_Object pointer to the above, used for staticpro */
72 static Lisp_Object Vbuffer_defaults
;
74 /* This structure marks which slots in a buffer have corresponding
75 default values in buffer_defaults.
76 Each such slot has a nonzero value in this structure.
77 The value has only one nonzero bit.
79 When a buffer has its own local value for a slot,
80 the entry for that slot (found in the same slot in this structure)
81 is turned on in the buffer's local_flags array.
83 If a slot in this structure is -1, then even though there may
84 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
85 and the corresponding slot in buffer_defaults is not used.
87 If a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
88 but there is a default value which is copied into each buffer.
90 If a slot in this structure is negative, then even though there may
91 be a DEFVAR_PER_BUFFER for the slot, there is no default value for it;
92 and the corresponding slot in buffer_defaults is not used.
94 If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
95 zero, that is a bug */
97 struct buffer buffer_local_flags
;
99 /* This structure holds the names of symbols whose values may be
100 buffer-local. It is indexed and accessed in the same way as the above. */
102 struct buffer buffer_local_symbols
;
103 /* A Lisp_Object pointer to the above, used for staticpro */
104 static Lisp_Object Vbuffer_local_symbols
;
106 /* This structure holds the required types for the values in the
107 buffer-local slots. If a slot contains Qnil, then the
108 corresponding buffer slot may contain a value of any type. If a
109 slot contains an integer, then prospective values' tags must be
110 equal to that integer (except nil is always allowed).
111 When a tag does not match, the function
112 buffer_slot_type_mismatch will signal an error.
114 If a slot here contains -1, the corresponding variable is read-only. */
115 struct buffer buffer_local_types
;
117 /* Flags indicating which built-in buffer-local variables
118 are permanent locals. */
119 static char buffer_permanent_local_flags
[MAX_PER_BUFFER_VARS
];
121 /* Number of per-buffer variables used. */
123 int last_per_buffer_idx
;
125 Lisp_Object
Fset_buffer ();
126 void set_buffer_internal ();
127 void set_buffer_internal_1 ();
128 static void call_overlay_mod_hooks ();
129 static void swap_out_buffer_local_variables ();
130 static void reset_buffer_local_variables ();
132 /* Alist of all buffer names vs the buffers. */
133 /* This used to be a variable, but is no longer,
134 to prevent lossage due to user rplac'ing this alist or its elements. */
135 Lisp_Object Vbuffer_alist
;
137 /* Functions to call before and after each text change. */
138 Lisp_Object Vbefore_change_functions
;
139 Lisp_Object Vafter_change_functions
;
141 Lisp_Object Vtransient_mark_mode
;
143 /* t means ignore all read-only text properties.
144 A list means ignore such a property if its value is a member of the list.
145 Any non-nil value means ignore buffer-read-only. */
146 Lisp_Object Vinhibit_read_only
;
148 /* List of functions to call that can query about killing a buffer.
149 If any of these functions returns nil, we don't kill it. */
150 Lisp_Object Vkill_buffer_query_functions
;
152 /* List of functions to call before changing an unmodified buffer. */
153 Lisp_Object Vfirst_change_hook
;
155 Lisp_Object Qfirst_change_hook
;
156 Lisp_Object Qbefore_change_functions
;
157 Lisp_Object Qafter_change_functions
;
159 /* If nonzero, all modification hooks are suppressed. */
160 int inhibit_modification_hooks
;
162 Lisp_Object Qfundamental_mode
, Qmode_class
, Qpermanent_local
;
164 Lisp_Object Qprotected_field
;
166 Lisp_Object QSFundamental
; /* A string "Fundamental" */
168 Lisp_Object Qkill_buffer_hook
;
170 Lisp_Object Qget_file_buffer
;
172 Lisp_Object Qoverlayp
;
174 Lisp_Object Qpriority
, Qwindow
, Qevaporate
, Qbefore_string
, Qafter_string
;
176 Lisp_Object Qmodification_hooks
;
177 Lisp_Object Qinsert_in_front_hooks
;
178 Lisp_Object Qinsert_behind_hooks
;
180 static void alloc_buffer_text
P_ ((struct buffer
*, size_t));
181 static void free_buffer_text
P_ ((struct buffer
*b
));
184 /* For debugging; temporary. See set_buffer_internal. */
185 /* Lisp_Object Qlisp_mode, Vcheck_symbol; */
192 error ("No buffer named %s", XSTRING (spec
)->data
);
193 error ("Invalid buffer argument");
196 DEFUN ("buffer-live-p", Fbuffer_live_p
, Sbuffer_live_p
, 1, 1, 0,
197 "Return non-nil if OBJECT is a buffer which has not been killed.\n\
198 Value is nil if OBJECT is not a buffer or if it has been killed.")
202 return ((BUFFERP (object
) && ! NILP (XBUFFER (object
)->name
))
206 DEFUN ("buffer-list", Fbuffer_list
, Sbuffer_list
, 0, 1, 0,
207 "Return a list of all existing live buffers.\n\
208 If the optional arg FRAME is a frame, we return that frame's buffer list.")
212 Lisp_Object framelist
, general
;
213 general
= Fmapcar (Qcdr
, Vbuffer_alist
);
219 CHECK_FRAME (frame
, 1);
221 framelist
= Fcopy_sequence (XFRAME (frame
)->buffer_list
);
223 /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */
225 while (! NILP (tail
))
227 general
= Fdelq (XCAR (tail
), general
);
230 return nconc2 (framelist
, general
);
236 /* Like Fassoc, but use Fstring_equal to compare
237 (which ignores text properties),
238 and don't ever QUIT. */
241 assoc_ignore_text_properties (key
, list
)
242 register Lisp_Object key
;
245 register Lisp_Object tail
;
246 for (tail
= list
; !NILP (tail
); tail
= Fcdr (tail
))
248 register Lisp_Object elt
, tem
;
250 tem
= Fstring_equal (Fcar (elt
), key
);
257 DEFUN ("get-buffer", Fget_buffer
, Sget_buffer
, 1, 1, 0,
258 "Return the buffer named NAME (a string).\n\
259 If there is no live buffer named NAME, return nil.\n\
260 NAME may also be a buffer; if so, the value is that buffer.")
262 register Lisp_Object name
;
266 CHECK_STRING (name
, 0);
268 return Fcdr (assoc_ignore_text_properties (name
, Vbuffer_alist
));
271 DEFUN ("get-file-buffer", Fget_file_buffer
, Sget_file_buffer
, 1, 1, 0,
272 "Return the buffer visiting file FILENAME (a string).\n\
273 The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\
274 If there is no such live buffer, return nil.\n\
275 See also `find-buffer-visiting'.")
277 register Lisp_Object filename
;
279 register Lisp_Object tail
, buf
, tem
;
282 CHECK_STRING (filename
, 0);
283 filename
= Fexpand_file_name (filename
, Qnil
);
285 /* If the file name has special constructs in it,
286 call the corresponding file handler. */
287 handler
= Ffind_file_name_handler (filename
, Qget_file_buffer
);
289 return call2 (handler
, Qget_file_buffer
, filename
);
291 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
293 buf
= Fcdr (XCAR (tail
));
294 if (!BUFFERP (buf
)) continue;
295 if (!STRINGP (XBUFFER (buf
)->filename
)) continue;
296 tem
= Fstring_equal (XBUFFER (buf
)->filename
, filename
);
304 get_truename_buffer (filename
)
305 register Lisp_Object filename
;
307 register Lisp_Object tail
, buf
, tem
;
309 for (tail
= Vbuffer_alist
; CONSP (tail
); tail
= XCDR (tail
))
311 buf
= Fcdr (XCAR (tail
));
312 if (!BUFFERP (buf
)) continue;
313 if (!STRINGP (XBUFFER (buf
)->file_truename
)) continue;
314 tem
= Fstring_equal (XBUFFER (buf
)->file_truename
, filename
);
321 /* Incremented for each buffer created, to assign the buffer number. */
324 DEFUN ("get-buffer-create", Fget_buffer_create
, Sget_buffer_create
, 1, 1, 0,
325 "Return the buffer named NAME, or create such a buffer and return it.\n\
326 A new buffer is created if there is no live buffer named NAME.\n\
327 If NAME starts with a space, the new buffer does not keep undo information.\n\
328 If NAME is a buffer instead of a string, then it is the value returned.\n\
329 The value is never nil.")
331 register Lisp_Object name
;
333 register Lisp_Object buf
;
334 register struct buffer
*b
;
336 buf
= Fget_buffer (name
);
340 if (XSTRING (name
)->size
== 0)
341 error ("Empty string for buffer name is not allowed");
343 b
= (struct buffer
*) allocate_buffer ();
345 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
347 /* An ordinary buffer uses its own struct buffer_text. */
348 b
->text
= &b
->own_text
;
351 BUF_GAP_SIZE (b
) = 20;
353 /* We allocate extra 1-byte at the tail and keep it always '\0' for
354 anchoring a search. */
355 alloc_buffer_text (b
, BUF_GAP_SIZE (b
) + 1);
357 if (! BUF_BEG_ADDR (b
))
358 buffer_memory_full ();
366 BUF_GPT_BYTE (b
) = 1;
367 BUF_BEGV_BYTE (b
) = 1;
371 BUF_OVERLAY_MODIFF (b
) = 1;
372 BUF_SAVE_MODIFF (b
) = 1;
373 BUF_INTERVALS (b
) = 0;
374 BUF_UNCHANGED_MODIFIED (b
) = 1;
375 BUF_OVERLAY_UNCHANGED_MODIFIED (b
) = 1;
376 BUF_END_UNCHANGED (b
) = 0;
377 BUF_BEG_UNCHANGED (b
) = 0;
378 *(BUF_GPT_ADDR (b
)) = *(BUF_Z_ADDR (b
)) = 0; /* Put an anchor '\0'. */
380 b
->newline_cache
= 0;
381 b
->width_run_cache
= 0;
382 b
->width_table
= Qnil
;
383 b
->prevent_redisplay_optimizations_p
= 1;
385 /* Put this on the chain of all buffers including killed ones. */
386 b
->next
= all_buffers
;
389 /* An ordinary buffer normally doesn't need markers
390 to handle BEGV and ZV. */
392 b
->begv_marker
= Qnil
;
395 name
= Fcopy_sequence (name
);
396 XSTRING (name
)->intervals
= NULL_INTERVAL
;
399 if (XSTRING (name
)->data
[0] != ' ')
405 reset_buffer_local_variables (b
, 1);
407 /* Put this in the alist of all live buffers. */
409 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
411 b
->mark
= Fmake_marker ();
412 BUF_MARKERS (b
) = Qnil
;
418 /* Clone per-buffer values of buffer FROM.
420 Buffer TO gets the same per-buffer values as FROM, with the
421 following exceptions: (1) TO's name is left untouched, (2) markers
422 are copied and made to refer to TO, and (3) overlay lists are
426 clone_per_buffer_values (from
, to
)
427 struct buffer
*from
, *to
;
429 Lisp_Object to_buffer
;
432 XSETBUFFER (to_buffer
, to
);
434 for (offset
= PER_BUFFER_VAR_OFFSET (name
) + sizeof (Lisp_Object
);
436 offset
+= sizeof (Lisp_Object
))
440 obj
= PER_BUFFER_VALUE (from
, offset
);
443 struct Lisp_Marker
*m
= XMARKER (obj
);
444 obj
= Fmake_marker ();
445 XMARKER (obj
)->insertion_type
= m
->insertion_type
;
446 set_marker_both (obj
, to_buffer
, m
->charpos
, m
->bytepos
);
449 PER_BUFFER_VALUE (to
, offset
) = obj
;
452 to
->overlays_after
= Fcopy_sequence (from
->overlays_after
);
453 to
->overlays_before
= Fcopy_sequence (to
->overlays_before
);
454 bcopy (from
->local_flags
, to
->local_flags
, sizeof to
->local_flags
);
458 DEFUN ("make-indirect-buffer", Fmake_indirect_buffer
, Smake_indirect_buffer
,
460 "bMake indirect buffer (to buffer): \nBName of indirect buffer: ",
461 "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\
462 BASE-BUFFER should be an existing buffer (or buffer name).\n\
463 NAME should be a string which is not the name of an existing buffer.\n\
464 Optional argument CLONE non-nil means preserve BASE-BUFFER's state,\n\
465 such as major and minor modes, in the indirect buffer.\n\
466 CLONE nil means the indirect buffer's state is reset to default values.")
467 (base_buffer
, name
, clone
)
468 Lisp_Object base_buffer
, name
, clone
;
473 buf
= Fget_buffer (name
);
475 error ("Buffer name `%s' is in use", XSTRING (name
)->data
);
477 base_buffer
= Fget_buffer (base_buffer
);
478 if (NILP (base_buffer
))
479 error ("No such buffer: `%s'",
480 XSTRING (XBUFFER (base_buffer
)->name
)->data
);
482 if (XSTRING (name
)->size
== 0)
483 error ("Empty string for buffer name is not allowed");
485 b
= (struct buffer
*) allocate_buffer ();
486 b
->size
= sizeof (struct buffer
) / sizeof (EMACS_INT
);
488 if (XBUFFER (base_buffer
)->base_buffer
)
489 b
->base_buffer
= XBUFFER (base_buffer
)->base_buffer
;
491 b
->base_buffer
= XBUFFER (base_buffer
);
493 /* Use the base buffer's text object. */
494 b
->text
= b
->base_buffer
->text
;
496 BUF_BEGV (b
) = BUF_BEGV (b
->base_buffer
);
497 BUF_ZV (b
) = BUF_ZV (b
->base_buffer
);
498 BUF_PT (b
) = BUF_PT (b
->base_buffer
);
499 BUF_BEGV_BYTE (b
) = BUF_BEGV_BYTE (b
->base_buffer
);
500 BUF_ZV_BYTE (b
) = BUF_ZV_BYTE (b
->base_buffer
);
501 BUF_PT_BYTE (b
) = BUF_PT_BYTE (b
->base_buffer
);
503 b
->newline_cache
= 0;
504 b
->width_run_cache
= 0;
505 b
->width_table
= Qnil
;
507 /* Put this on the chain of all buffers including killed ones. */
508 b
->next
= all_buffers
;
511 name
= Fcopy_sequence (name
);
512 XSTRING (name
)->intervals
= NULL_INTERVAL
;
516 reset_buffer_local_variables (b
, 1);
518 /* Put this in the alist of all live buffers. */
520 Vbuffer_alist
= nconc2 (Vbuffer_alist
, Fcons (Fcons (name
, buf
), Qnil
));
522 b
->mark
= Fmake_marker ();
525 /* The multibyte status belongs to the base buffer. */
526 b
->enable_multibyte_characters
= b
->base_buffer
->enable_multibyte_characters
;
528 /* Make sure the base buffer has markers for its narrowing. */
529 if (NILP (b
->base_buffer
->pt_marker
))
531 b
->base_buffer
->pt_marker
= Fmake_marker ();
532 set_marker_both (b
->base_buffer
->pt_marker
, base_buffer
,
533 BUF_PT (b
->base_buffer
),
534 BUF_PT_BYTE (b
->base_buffer
));
536 if (NILP (b
->base_buffer
->begv_marker
))
538 b
->base_buffer
->begv_marker
= Fmake_marker ();
539 set_marker_both (b
->base_buffer
->begv_marker
, base_buffer
,
540 BUF_BEGV (b
->base_buffer
),
541 BUF_BEGV_BYTE (b
->base_buffer
));
543 if (NILP (b
->base_buffer
->zv_marker
))
545 b
->base_buffer
->zv_marker
= Fmake_marker ();
546 set_marker_both (b
->base_buffer
->zv_marker
, base_buffer
,
547 BUF_ZV (b
->base_buffer
),
548 BUF_ZV_BYTE (b
->base_buffer
));
549 XMARKER (b
->base_buffer
->zv_marker
)->insertion_type
= 1;
554 /* Give the indirect buffer markers for its narrowing. */
555 b
->pt_marker
= Fmake_marker ();
556 set_marker_both (b
->pt_marker
, buf
, BUF_PT (b
), BUF_PT_BYTE (b
));
557 b
->begv_marker
= Fmake_marker ();
558 set_marker_both (b
->begv_marker
, buf
, BUF_BEGV (b
), BUF_BEGV_BYTE (b
));
559 b
->zv_marker
= Fmake_marker ();
560 set_marker_both (b
->zv_marker
, buf
, BUF_ZV (b
), BUF_ZV_BYTE (b
));
561 XMARKER (b
->zv_marker
)->insertion_type
= 1;
564 clone_per_buffer_values (b
->base_buffer
, b
);
569 /* Reinitialize everything about a buffer except its name and contents
570 and local variables. */
574 register struct buffer
*b
;
577 b
->file_truename
= Qnil
;
578 b
->directory
= (current_buffer
) ? current_buffer
->directory
: Qnil
;
580 XSETFASTINT (b
->save_length
, 0);
581 b
->last_window_start
= 1;
582 /* It is more conservative to start out "changed" than "unchanged". */
584 b
->prevent_redisplay_optimizations_p
= 1;
586 b
->auto_save_modified
= 0;
587 b
->auto_save_failure_time
= -1;
588 b
->auto_save_file_name
= Qnil
;
590 b
->overlays_before
= Qnil
;
591 b
->overlays_after
= Qnil
;
592 XSETFASTINT (b
->overlay_center
, 1);
593 b
->mark_active
= Qnil
;
594 b
->point_before_scroll
= Qnil
;
595 b
->file_format
= Qnil
;
596 b
->last_selected_window
= Qnil
;
597 XSETINT (b
->display_count
, 0);
598 b
->display_time
= Qnil
;
599 b
->enable_multibyte_characters
= buffer_defaults
.enable_multibyte_characters
;
600 b
->cursor_type
= buffer_defaults
.cursor_type
;
601 b
->extra_line_spacing
= buffer_defaults
.extra_line_spacing
;
604 /* Reset buffer B's local variables info.
605 Don't use this on a buffer that has already been in use;
606 it does not treat permanent locals consistently.
607 Instead, use Fkill_all_local_variables.
609 If PERMANENT_TOO is 1, then we reset permanent built-in
610 buffer-local variables. If PERMANENT_TOO is 0,
611 we preserve those. */
614 reset_buffer_local_variables (b
, permanent_too
)
615 register struct buffer
*b
;
621 /* Reset the major mode to Fundamental, together with all the
622 things that depend on the major mode.
623 default-major-mode is handled at a higher level.
624 We ignore it here. */
625 b
->major_mode
= Qfundamental_mode
;
627 b
->abbrev_table
= Vfundamental_mode_abbrev_table
;
628 b
->mode_name
= QSFundamental
;
629 b
->minor_modes
= Qnil
;
631 /* If the standard case table has been altered and invalidated,
632 fix up its insides first. */
633 if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[0])
634 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[1])
635 && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table
)->extras
[2])))
636 Fset_standard_case_table (Vascii_downcase_table
);
638 b
->downcase_table
= Vascii_downcase_table
;
639 b
->upcase_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[0];
640 b
->case_canon_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[1];
641 b
->case_eqv_table
= XCHAR_TABLE (Vascii_downcase_table
)->extras
[2];
642 b
->invisibility_spec
= Qt
;
644 b
->buffer_file_type
= Qnil
;
648 b
->sort_table
= XSTRING (Vascii_sort_table
);
649 b
->folding_sort_table
= XSTRING (Vascii_folding_sort_table
);
652 /* Reset all (or most) per-buffer variables to their defaults. */
653 b
->local_var_alist
= Qnil
;
654 for (i
= 0; i
< last_per_buffer_idx
; ++i
)
655 if (permanent_too
|| buffer_permanent_local_flags
[i
] == 0)
656 SET_PER_BUFFER_VALUE_P (b
, i
, 0);
658 /* For each slot that has a default value,
659 copy that into the slot. */
661 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
663 offset
+= sizeof (Lisp_Object
))
665 int idx
= PER_BUFFER_IDX (offset
);
668 || buffer_permanent_local_flags
[idx
] == 0))
669 /* Is -2 used anywhere? */
671 PER_BUFFER_VALUE (b
, offset
) = PER_BUFFER_DEFAULT (offset
);
675 /* We split this away from generate-new-buffer, because rename-buffer
676 and set-visited-file-name ought to be able to use this to really
677 rename the buffer properly. */
679 DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name
, Sgenerate_new_buffer_name
,
681 "Return a string that is the name of no existing buffer based on NAME.\n\
682 If there is no live buffer named NAME, then return NAME.\n\
683 Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\
684 until an unused name is found, and then return that name.\n\
685 Optional second argument IGNORE specifies a name that is okay to use\n\
686 \(if it is in the sequence to be tried)\n\
687 even if a buffer with that name exists.")
689 register Lisp_Object name
, ignore
;
691 register Lisp_Object gentemp
, tem
;
695 CHECK_STRING (name
, 0);
697 tem
= Fget_buffer (name
);
704 sprintf (number
, "<%d>", ++count
);
705 gentemp
= concat2 (name
, build_string (number
));
706 tem
= Fstring_equal (gentemp
, ignore
);
709 tem
= Fget_buffer (gentemp
);
716 DEFUN ("buffer-name", Fbuffer_name
, Sbuffer_name
, 0, 1, 0,
717 "Return the name of BUFFER, as a string.\n\
718 With no argument or nil as argument, return the name of the current buffer.")
720 register Lisp_Object buffer
;
723 return current_buffer
->name
;
724 CHECK_BUFFER (buffer
, 0);
725 return XBUFFER (buffer
)->name
;
728 DEFUN ("buffer-file-name", Fbuffer_file_name
, Sbuffer_file_name
, 0, 1, 0,
729 "Return name of file BUFFER is visiting, or nil if none.\n\
730 No argument or nil as argument means use the current buffer.")
732 register Lisp_Object buffer
;
735 return current_buffer
->filename
;
736 CHECK_BUFFER (buffer
, 0);
737 return XBUFFER (buffer
)->filename
;
740 DEFUN ("buffer-base-buffer", Fbuffer_base_buffer
, Sbuffer_base_buffer
,
742 "Return the base buffer of indirect buffer BUFFER.\n\
743 If BUFFER is not indirect, return nil.")
745 register Lisp_Object buffer
;
748 Lisp_Object base_buffer
;
751 base
= current_buffer
->base_buffer
;
754 CHECK_BUFFER (buffer
, 0);
755 base
= XBUFFER (buffer
)->base_buffer
;
760 XSETBUFFER (base_buffer
, base
);
764 DEFUN ("buffer-local-variables", Fbuffer_local_variables
,
765 Sbuffer_local_variables
, 0, 1, 0,
766 "Return an alist of variables that are buffer-local in BUFFER.\n\
767 Most elements look like (SYMBOL . VALUE), describing one variable.\n\
768 For a symbol that is locally unbound, just the symbol appears in the value.\n\
769 Note that storing new VALUEs in these elements doesn't change the variables.\n\
770 No argument or nil as argument means use current buffer as BUFFER.")
772 register Lisp_Object buffer
;
774 register struct buffer
*buf
;
775 register Lisp_Object result
;
778 buf
= current_buffer
;
781 CHECK_BUFFER (buffer
, 0);
782 buf
= XBUFFER (buffer
);
788 register Lisp_Object tail
;
789 for (tail
= buf
->local_var_alist
; CONSP (tail
); tail
= XCDR (tail
))
791 Lisp_Object val
, elt
;
795 /* Reference each variable in the alist in buf.
796 If inquiring about the current buffer, this gets the current values,
797 so store them into the alist so the alist is up to date.
798 If inquiring about some other buffer, this swaps out any values
799 for that buffer, making the alist up to date automatically. */
800 val
= find_symbol_value (XCAR (elt
));
801 /* Use the current buffer value only if buf is the current buffer. */
802 if (buf
!= current_buffer
)
805 /* If symbol is unbound, put just the symbol in the list. */
806 if (EQ (val
, Qunbound
))
807 result
= Fcons (XCAR (elt
), result
);
808 /* Otherwise, put (symbol . value) in the list. */
810 result
= Fcons (Fcons (XCAR (elt
), val
), result
);
814 /* Add on all the variables stored in special slots. */
818 for (offset
= PER_BUFFER_VAR_OFFSET (name
);
819 offset
< sizeof (struct buffer
);
820 /* sizeof EMACS_INT == sizeof Lisp_Object */
821 offset
+= (sizeof (EMACS_INT
)))
823 idx
= PER_BUFFER_IDX (offset
);
824 if ((idx
== -1 || PER_BUFFER_VALUE_P (buf
, idx
))
825 && SYMBOLP (PER_BUFFER_SYMBOL (offset
)))
826 result
= Fcons (Fcons (PER_BUFFER_SYMBOL (offset
),
827 PER_BUFFER_VALUE (buf
, offset
)),
836 DEFUN ("buffer-modified-p", Fbuffer_modified_p
, Sbuffer_modified_p
,
838 "Return t if BUFFER was modified since its file was last read or saved.\n\
839 No argument or nil as argument means use current buffer as BUFFER.")
841 register Lisp_Object buffer
;
843 register struct buffer
*buf
;
845 buf
= current_buffer
;
848 CHECK_BUFFER (buffer
, 0);
849 buf
= XBUFFER (buffer
);
852 return BUF_SAVE_MODIFF (buf
) < BUF_MODIFF (buf
) ? Qt
: Qnil
;
855 DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p
, Sset_buffer_modified_p
,
857 "Mark current buffer as modified or unmodified according to FLAG.\n\
858 A non-nil FLAG means mark the buffer modified.")
860 register Lisp_Object flag
;
862 register int already
;
863 register Lisp_Object fn
;
864 Lisp_Object buffer
, window
;
866 #ifdef CLASH_DETECTION
867 /* If buffer becoming modified, lock the file.
868 If buffer becoming unmodified, unlock the file. */
870 fn
= current_buffer
->file_truename
;
871 /* Test buffer-file-name so that binding it to nil is effective. */
872 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
874 already
= SAVE_MODIFF
< MODIFF
;
875 if (!already
&& !NILP (flag
))
877 else if (already
&& NILP (flag
))
880 #endif /* CLASH_DETECTION */
882 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
884 /* Set update_mode_lines only if buffer is displayed in some window.
885 Packages like jit-lock or lazy-lock preserve a buffer's modified
886 state by recording/restoring the state around blocks of code.
887 Setting update_mode_lines makes redisplay consider all windows
888 (on all frames). Stealth fontification of buffers not displayed
889 would incur additional redisplay costs if we'd set
890 update_modes_lines unconditionally.
892 Ideally, I think there should be another mechanism for fontifying
893 buffers without "modifying" buffers, or redisplay should be
894 smarter about updating the `*' in mode lines. --gerd */
895 XSETBUFFER (buffer
, current_buffer
);
896 window
= Fget_buffer_window (buffer
, Qt
);
897 if (WINDOWP (window
))
903 DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p
,
904 Srestore_buffer_modified_p
, 1, 1, 0,
905 "Like `set-buffer-modified-p', with a differences concerning redisplay.\n\
906 It is not ensured that mode lines will be updated to show the modified\n\
907 state of the current buffer. Use with care.")
911 #ifdef CLASH_DETECTION
914 /* If buffer becoming modified, lock the file.
915 If buffer becoming unmodified, unlock the file. */
917 fn
= current_buffer
->file_truename
;
918 /* Test buffer-file-name so that binding it to nil is effective. */
919 if (!NILP (fn
) && ! NILP (current_buffer
->filename
))
921 int already
= SAVE_MODIFF
< MODIFF
;
922 if (!already
&& !NILP (flag
))
924 else if (already
&& NILP (flag
))
927 #endif /* CLASH_DETECTION */
929 SAVE_MODIFF
= NILP (flag
) ? MODIFF
: 0;
933 DEFUN ("buffer-modified-tick", Fbuffer_modified_tick
, Sbuffer_modified_tick
,
935 "Return BUFFER's tick counter, incremented for each change in text.\n\
936 Each buffer has a tick counter which is incremented each time the text in\n\
937 that buffer is changed. It wraps around occasionally.\n\
938 No argument or nil as argument means use current buffer as BUFFER.")
940 register Lisp_Object buffer
;
942 register struct buffer
*buf
;
944 buf
= current_buffer
;
947 CHECK_BUFFER (buffer
, 0);
948 buf
= XBUFFER (buffer
);
951 return make_number (BUF_MODIFF (buf
));
954 DEFUN ("rename-buffer", Frename_buffer
, Srename_buffer
, 1, 2,
955 "sRename buffer (to new name): \nP",
956 "Change current buffer's name to NEWNAME (a string).\n\
957 If second arg UNIQUE is nil or omitted, it is an error if a\n\
958 buffer named NEWNAME already exists.\n\
959 If UNIQUE is non-nil, come up with a new name using\n\
960 `generate-new-buffer-name'.\n\
961 Interactively, you can set UNIQUE with a prefix argument.\n\
962 We return the name we actually gave the buffer.\n\
963 This does not change the name of the visited file (if any).")
965 register Lisp_Object newname
, unique
;
967 register Lisp_Object tem
, buf
;
969 CHECK_STRING (newname
, 0);
971 if (XSTRING (newname
)->size
== 0)
972 error ("Empty string is invalid as a buffer name");
974 tem
= Fget_buffer (newname
);
977 /* Don't short-circuit if UNIQUE is t. That is a useful way to
978 rename the buffer automatically so you can create another
979 with the original name. It makes UNIQUE equivalent to
980 (rename-buffer (generate-new-buffer-name NEWNAME)). */
981 if (NILP (unique
) && XBUFFER (tem
) == current_buffer
)
982 return current_buffer
->name
;
984 newname
= Fgenerate_new_buffer_name (newname
, current_buffer
->name
);
986 error ("Buffer name `%s' is in use", XSTRING (newname
)->data
);
989 current_buffer
->name
= newname
;
991 /* Catch redisplay's attention. Unless we do this, the mode lines for
992 any windows displaying current_buffer will stay unchanged. */
995 XSETBUFFER (buf
, current_buffer
);
996 Fsetcar (Frassq (buf
, Vbuffer_alist
), newname
);
997 if (NILP (current_buffer
->filename
)
998 && !NILP (current_buffer
->auto_save_file_name
))
999 call0 (intern ("rename-auto-save-file"));
1000 /* Refetch since that last call may have done GC. */
1001 return current_buffer
->name
;
1004 DEFUN ("other-buffer", Fother_buffer
, Sother_buffer
, 0, 3, 0,
1005 "Return most recently selected buffer other than BUFFER.\n\
1006 Buffers not visible in windows are preferred to visible buffers,\n\
1007 unless optional second argument VISIBLE-OK is non-nil.\n\
1008 If the optional third argument FRAME is non-nil, use that frame's\n\
1009 buffer list instead of the selected frame's buffer list.\n\
1010 If no other buffer exists, the buffer `*scratch*' is returned.\n\
1011 If BUFFER is omitted or nil, some interesting buffer is returned.")
1012 (buffer
, visible_ok
, frame
)
1013 register Lisp_Object buffer
, visible_ok
, frame
;
1015 Lisp_Object
Fset_buffer_major_mode ();
1016 register Lisp_Object tail
, buf
, notsogood
, tem
, pred
, add_ons
;
1020 frame
= selected_frame
;
1022 tail
= Vbuffer_alist
;
1023 pred
= frame_buffer_predicate (frame
);
1025 /* Consider buffers that have been seen in the selected frame
1026 before other buffers. */
1028 tem
= frame_buffer_list (frame
);
1032 if (BUFFERP (XCAR (tem
)))
1033 add_ons
= Fcons (Fcons (Qnil
, XCAR (tem
)), add_ons
);
1036 tail
= nconc2 (Fnreverse (add_ons
), tail
);
1038 for (; !NILP (tail
); tail
= Fcdr (tail
))
1040 buf
= Fcdr (Fcar (tail
));
1041 if (EQ (buf
, buffer
))
1043 if (XSTRING (XBUFFER (buf
)->name
)->data
[0] == ' ')
1045 /* If the selected frame has a buffer_predicate,
1046 disregard buffers that don't fit the predicate. */
1049 tem
= call1 (pred
, buf
);
1054 if (NILP (visible_ok
))
1055 tem
= Fget_buffer_window (buf
, Qvisible
);
1060 if (NILP (notsogood
))
1063 if (!NILP (notsogood
))
1065 buf
= Fget_buffer (build_string ("*scratch*"));
1068 buf
= Fget_buffer_create (build_string ("*scratch*"));
1069 Fset_buffer_major_mode (buf
);
1074 DEFUN ("buffer-disable-undo", Fbuffer_disable_undo
, Sbuffer_disable_undo
,
1076 "Make BUFFER stop keeping undo information.\n\
1077 No argument or nil as argument means do this for the current buffer.")
1079 register Lisp_Object buffer
;
1081 Lisp_Object real_buffer
;
1084 XSETBUFFER (real_buffer
, current_buffer
);
1087 real_buffer
= Fget_buffer (buffer
);
1088 if (NILP (real_buffer
))
1092 XBUFFER (real_buffer
)->undo_list
= Qt
;
1097 DEFUN ("buffer-enable-undo", Fbuffer_enable_undo
, Sbuffer_enable_undo
,
1099 "Start keeping undo information for buffer BUFFER.\n\
1100 No argument or nil as argument means do this for the current buffer.")
1102 register Lisp_Object buffer
;
1104 Lisp_Object real_buffer
;
1107 XSETBUFFER (real_buffer
, current_buffer
);
1110 real_buffer
= Fget_buffer (buffer
);
1111 if (NILP (real_buffer
))
1115 if (EQ (XBUFFER (real_buffer
)->undo_list
, Qt
))
1116 XBUFFER (real_buffer
)->undo_list
= Qnil
;
1122 DEFVAR_LISP ("kill-buffer-hook", no_cell, "\
1123 Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\
1124 The buffer being killed will be current while the hook is running.\n\
1127 DEFUN ("kill-buffer", Fkill_buffer
, Skill_buffer
, 1, 1, "bKill buffer: ",
1128 "Kill the buffer BUFFER.\n\
1129 The argument may be a buffer or may be the name of a buffer.\n\
1130 An argument of nil means kill the current buffer.\n\n\
1131 Value is t if the buffer is actually killed, nil if user says no.\n\n\
1132 The value of `kill-buffer-hook' (which may be local to that buffer),\n\
1133 if not void, is a list of functions to be called, with no arguments,\n\
1134 before the buffer is actually killed. The buffer to be killed is current\n\
1135 when the hook functions are called.\n\n\
1136 Any processes that have this buffer as the `process-buffer' are killed\n\
1142 register struct buffer
*b
;
1143 register Lisp_Object tem
;
1144 register struct Lisp_Marker
*m
;
1145 struct gcpro gcpro1
;
1148 buf
= Fcurrent_buffer ();
1150 buf
= Fget_buffer (buffer
);
1156 /* Avoid trouble for buffer already dead. */
1160 /* Query if the buffer is still modified. */
1161 if (INTERACTIVE
&& !NILP (b
->filename
)
1162 && BUF_MODIFF (b
) > BUF_SAVE_MODIFF (b
))
1165 tem
= do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ",
1166 XSTRING (b
->name
)->data
));
1172 /* Run hooks with the buffer to be killed the current buffer. */
1174 int count
= specpdl_ptr
- specpdl
;
1177 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1178 set_buffer_internal (b
);
1180 /* First run the query functions; if any query is answered no,
1181 don't kill the buffer. */
1182 for (list
= Vkill_buffer_query_functions
; !NILP (list
); list
= Fcdr (list
))
1184 tem
= call0 (Fcar (list
));
1186 return unbind_to (count
, Qnil
);
1189 /* Then run the hooks. */
1190 if (!NILP (Vrun_hooks
))
1191 call1 (Vrun_hooks
, Qkill_buffer_hook
);
1192 unbind_to (count
, Qnil
);
1195 /* We have no more questions to ask. Verify that it is valid
1196 to kill the buffer. This must be done after the questions
1197 since anything can happen within do_yes_or_no_p. */
1199 /* Don't kill the minibuffer now current. */
1200 if (EQ (buf
, XWINDOW (minibuf_window
)->buffer
))
1206 /* When we kill a base buffer, kill all its indirect buffers.
1207 We do it at this stage so nothing terrible happens if they
1208 ask questions or their hooks get errors. */
1209 if (! b
->base_buffer
)
1211 struct buffer
*other
;
1215 for (other
= all_buffers
; other
; other
= other
->next
)
1216 /* all_buffers contains dead buffers too;
1217 don't re-kill them. */
1218 if (other
->base_buffer
== b
&& !NILP (other
->name
))
1221 XSETBUFFER (buf
, other
);
1228 /* Make this buffer not be current.
1229 In the process, notice if this is the sole visible buffer
1230 and give up if so. */
1231 if (b
== current_buffer
)
1233 tem
= Fother_buffer (buf
, Qnil
, Qnil
);
1235 if (b
== current_buffer
)
1239 /* Now there is no question: we can kill the buffer. */
1241 #ifdef CLASH_DETECTION
1242 /* Unlock this buffer's file, if it is locked. */
1244 #endif /* CLASH_DETECTION */
1246 kill_buffer_processes (buf
);
1248 tem
= Vinhibit_quit
;
1250 replace_buffer_in_all_windows (buf
);
1251 Vbuffer_alist
= Fdelq (Frassq (buf
, Vbuffer_alist
), Vbuffer_alist
);
1252 frames_discard_buffer (buf
);
1253 Vinhibit_quit
= tem
;
1255 /* Delete any auto-save file, if we saved it in this session. */
1256 if (STRINGP (b
->auto_save_file_name
)
1257 && b
->auto_save_modified
!= 0
1258 && BUF_SAVE_MODIFF (b
) < b
->auto_save_modified
)
1261 tem
= Fsymbol_value (intern ("delete-auto-save-files"));
1263 internal_delete_file (b
->auto_save_file_name
);
1268 /* Unchain all markers that belong to this indirect buffer.
1269 Don't unchain the markers that belong to the base buffer
1270 or its other indirect buffers. */
1271 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1277 unchain_marker (tem
);
1283 /* Unchain all markers of this buffer and its indirect buffers.
1284 and leave them pointing nowhere. */
1285 for (tem
= BUF_MARKERS (b
); !NILP (tem
); )
1292 BUF_MARKERS (b
) = Qnil
;
1293 BUF_INTERVALS (b
) = NULL_INTERVAL
;
1295 /* Perhaps we should explicitly free the interval tree here... */
1298 /* Reset the local variables, so that this buffer's local values
1299 won't be protected from GC. They would be protected
1300 if they happened to remain encached in their symbols.
1301 This gets rid of them for certain. */
1302 swap_out_buffer_local_variables (b
);
1303 reset_buffer_local_variables (b
, 1);
1308 if (! b
->base_buffer
)
1309 free_buffer_text (b
);
1311 if (b
->newline_cache
)
1313 free_region_cache (b
->newline_cache
);
1314 b
->newline_cache
= 0;
1316 if (b
->width_run_cache
)
1318 free_region_cache (b
->width_run_cache
);
1319 b
->width_run_cache
= 0;
1321 b
->width_table
= Qnil
;
1323 b
->undo_list
= Qnil
;
1328 /* Move the assoc for buffer BUF to the front of buffer-alist. Since
1329 we do this each time BUF is selected visibly, the more recently
1330 selected buffers are always closer to the front of the list. This
1331 means that other_buffer is more likely to choose a relevant buffer. */
1337 register Lisp_Object link
, prev
;
1339 frame
= selected_frame
;
1342 for (link
= Vbuffer_alist
; CONSP (link
); link
= XCDR (link
))
1344 if (EQ (XCDR (XCAR (link
)), buf
))
1349 /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist);
1350 we cannot use Fdelq itself here because it allows quitting. */
1353 Vbuffer_alist
= XCDR (Vbuffer_alist
);
1355 XCDR (prev
) = XCDR (XCDR (prev
));
1357 XCDR (link
) = Vbuffer_alist
;
1358 Vbuffer_alist
= link
;
1360 /* Now move this buffer to the front of frame_buffer_list also. */
1363 for (link
= frame_buffer_list (frame
); CONSP (link
);
1366 if (EQ (XCAR (link
), buf
))
1371 /* Effectively do delq. */
1376 set_frame_buffer_list (frame
,
1377 XCDR (frame_buffer_list (frame
)));
1379 XCDR (prev
) = XCDR (XCDR (prev
));
1381 XCDR (link
) = frame_buffer_list (frame
);
1382 set_frame_buffer_list (frame
, link
);
1385 set_frame_buffer_list (frame
, Fcons (buf
, frame_buffer_list (frame
)));
1388 DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode
, Sset_buffer_major_mode
, 1, 1, 0,
1389 "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\
1390 Use this function before selecting the buffer, since it may need to inspect\n\
1391 the current buffer's major mode.")
1396 Lisp_Object function
;
1398 function
= buffer_defaults
.major_mode
;
1399 if (NILP (function
) && NILP (Fget (current_buffer
->major_mode
, Qmode_class
)))
1400 function
= current_buffer
->major_mode
;
1402 if (NILP (function
) || EQ (function
, Qfundamental_mode
))
1405 count
= specpdl_ptr
- specpdl
;
1407 /* To select a nonfundamental mode,
1408 select the buffer temporarily and then call the mode function. */
1410 record_unwind_protect (save_excursion_restore
, save_excursion_save ());
1412 Fset_buffer (buffer
);
1415 return unbind_to (count
, Qnil
);
1418 /* If switching buffers in WINDOW would be an error, return
1419 a C string saying what the error would be. */
1422 no_switch_window (window
)
1426 if (EQ (minibuf_window
, window
))
1427 return "Cannot switch buffers in minibuffer window";
1428 tem
= Fwindow_dedicated_p (window
);
1430 return "Cannot switch buffers in a dedicated window";
1434 /* Switch to buffer BUFFER in the selected window.
1435 If NORECORD is non-nil, don't call record_buffer. */
1438 switch_to_buffer_1 (buffer
, norecord
)
1439 Lisp_Object buffer
, norecord
;
1441 register Lisp_Object buf
;
1444 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1447 buf
= Fget_buffer (buffer
);
1450 buf
= Fget_buffer_create (buffer
);
1451 Fset_buffer_major_mode (buf
);
1455 if (NILP (norecord
))
1456 record_buffer (buf
);
1458 Fset_window_buffer (EQ (selected_window
, minibuf_window
)
1459 ? Fnext_window (minibuf_window
, Qnil
, Qnil
)
1466 DEFUN ("switch-to-buffer", Fswitch_to_buffer
, Sswitch_to_buffer
, 1, 2, "BSwitch to buffer: ",
1467 "Select buffer BUFFER in the current window.\n\
1468 BUFFER may be a buffer or a buffer name.\n\
1469 Optional second arg NORECORD non-nil means\n\
1470 do not put this buffer at the front of the list of recently selected ones.\n\
1472 WARNING: This is NOT the way to work on another buffer temporarily\n\
1473 within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\
1474 the window-buffer correspondences.")
1476 Lisp_Object buffer
, norecord
;
1480 err
= no_switch_window (selected_window
);
1481 if (err
) error (err
);
1483 return switch_to_buffer_1 (buffer
, norecord
);
1486 DEFUN ("pop-to-buffer", Fpop_to_buffer
, Spop_to_buffer
, 1, 3, 0,
1487 "Select buffer BUFFER in some window, preferably a different one.\n\
1488 If BUFFER is nil, then some other buffer is chosen.\n\
1489 If `pop-up-windows' is non-nil, windows can be split to do this.\n\
1490 If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\
1491 window even if BUFFER is already visible in the selected window.\n\
1492 This uses the function `display-buffer' as a subroutine; see the documentation\n\
1493 of `display-buffer' for additional customization information.\n\
1495 Optional third arg NORECORD non-nil means\n\
1496 do not put this buffer at the front of the list of recently selected ones.")
1497 (buffer
, other_window
, norecord
)
1498 Lisp_Object buffer
, other_window
, norecord
;
1500 register Lisp_Object buf
;
1502 buf
= Fother_buffer (Fcurrent_buffer (), Qnil
, Qnil
);
1505 buf
= Fget_buffer (buffer
);
1508 buf
= Fget_buffer_create (buffer
);
1509 Fset_buffer_major_mode (buf
);
1513 if (NILP (norecord
))
1514 record_buffer (buf
);
1515 Fselect_window (Fdisplay_buffer (buf
, other_window
, Qnil
));
1519 DEFUN ("current-buffer", Fcurrent_buffer
, Scurrent_buffer
, 0, 0, 0,
1520 "Return the current buffer as a Lisp object.")
1523 register Lisp_Object buf
;
1524 XSETBUFFER (buf
, current_buffer
);
1528 /* Set the current buffer to B.
1530 We previously set windows_or_buffers_changed here to invalidate
1531 global unchanged information in beg_unchanged and end_unchanged.
1532 This is no longer necessary because we now compute unchanged
1533 information on a buffer-basis. Every action affecting other
1534 windows than the selected one requires a select_window at some
1535 time, and that increments windows_or_buffers_changed. */
1538 set_buffer_internal (b
)
1539 register struct buffer
*b
;
1541 if (current_buffer
!= b
)
1542 set_buffer_internal_1 (b
);
1545 /* Set the current buffer to B, and do not set windows_or_buffers_changed.
1546 This is used by redisplay. */
1549 set_buffer_internal_1 (b
)
1550 register struct buffer
*b
;
1552 register struct buffer
*old_buf
;
1553 register Lisp_Object tail
, valcontents
;
1556 #ifdef USE_MMAP_FOR_BUFFERS
1557 if (b
->text
->beg
== NULL
)
1558 enlarge_buffer_text (b
, 0);
1559 #endif /* USE_MMAP_FOR_BUFFERS */
1561 if (current_buffer
== b
)
1564 old_buf
= current_buffer
;
1566 last_known_column_point
= -1; /* invalidate indentation cache */
1570 /* Put the undo list back in the base buffer, so that it appears
1571 that an indirect buffer shares the undo list of its base. */
1572 if (old_buf
->base_buffer
)
1573 old_buf
->base_buffer
->undo_list
= old_buf
->undo_list
;
1575 /* If the old current buffer has markers to record PT, BEGV and ZV
1576 when it is not current, update them now. */
1577 if (! NILP (old_buf
->pt_marker
))
1580 XSETBUFFER (obuf
, old_buf
);
1581 set_marker_both (old_buf
->pt_marker
, obuf
,
1582 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1584 if (! NILP (old_buf
->begv_marker
))
1587 XSETBUFFER (obuf
, old_buf
);
1588 set_marker_both (old_buf
->begv_marker
, obuf
,
1589 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1591 if (! NILP (old_buf
->zv_marker
))
1594 XSETBUFFER (obuf
, old_buf
);
1595 set_marker_both (old_buf
->zv_marker
, obuf
,
1596 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1600 /* Get the undo list from the base buffer, so that it appears
1601 that an indirect buffer shares the undo list of its base. */
1603 b
->undo_list
= b
->base_buffer
->undo_list
;
1605 /* If the new current buffer has markers to record PT, BEGV and ZV
1606 when it is not current, fetch them now. */
1607 if (! NILP (b
->pt_marker
))
1609 BUF_PT (b
) = marker_position (b
->pt_marker
);
1610 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1612 if (! NILP (b
->begv_marker
))
1614 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1615 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1617 if (! NILP (b
->zv_marker
))
1619 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1620 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1623 /* Look down buffer's list of local Lisp variables
1624 to find and update any that forward into C variables. */
1626 for (tail
= b
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1628 valcontents
= XSYMBOL (XCAR (XCAR (tail
)))->value
;
1629 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1630 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1631 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1632 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1633 /* Just reference the variable
1634 to cause it to become set for this buffer. */
1635 Fsymbol_value (XCAR (XCAR (tail
)));
1638 /* Do the same with any others that were local to the previous buffer */
1641 for (tail
= old_buf
->local_var_alist
; !NILP (tail
); tail
= XCDR (tail
))
1643 valcontents
= XSYMBOL (XCAR (XCAR (tail
)))->value
;
1644 if ((BUFFER_LOCAL_VALUEP (valcontents
)
1645 || SOME_BUFFER_LOCAL_VALUEP (valcontents
))
1646 && (tem
= XBUFFER_LOCAL_VALUE (valcontents
)->realvalue
,
1647 (BOOLFWDP (tem
) || INTFWDP (tem
) || OBJFWDP (tem
))))
1648 /* Just reference the variable
1649 to cause it to become set for this buffer. */
1650 Fsymbol_value (XCAR (XCAR (tail
)));
1654 /* Switch to buffer B temporarily for redisplay purposes.
1655 This avoids certain things that don't need to be done within redisplay. */
1661 register struct buffer
*old_buf
;
1663 if (current_buffer
== b
)
1666 old_buf
= current_buffer
;
1671 /* If the old current buffer has markers to record PT, BEGV and ZV
1672 when it is not current, update them now. */
1673 if (! NILP (old_buf
->pt_marker
))
1676 XSETBUFFER (obuf
, old_buf
);
1677 set_marker_both (old_buf
->pt_marker
, obuf
,
1678 BUF_PT (old_buf
), BUF_PT_BYTE (old_buf
));
1680 if (! NILP (old_buf
->begv_marker
))
1683 XSETBUFFER (obuf
, old_buf
);
1684 set_marker_both (old_buf
->begv_marker
, obuf
,
1685 BUF_BEGV (old_buf
), BUF_BEGV_BYTE (old_buf
));
1687 if (! NILP (old_buf
->zv_marker
))
1690 XSETBUFFER (obuf
, old_buf
);
1691 set_marker_both (old_buf
->zv_marker
, obuf
,
1692 BUF_ZV (old_buf
), BUF_ZV_BYTE (old_buf
));
1696 /* If the new current buffer has markers to record PT, BEGV and ZV
1697 when it is not current, fetch them now. */
1698 if (! NILP (b
->pt_marker
))
1700 BUF_PT (b
) = marker_position (b
->pt_marker
);
1701 BUF_PT_BYTE (b
) = marker_byte_position (b
->pt_marker
);
1703 if (! NILP (b
->begv_marker
))
1705 BUF_BEGV (b
) = marker_position (b
->begv_marker
);
1706 BUF_BEGV_BYTE (b
) = marker_byte_position (b
->begv_marker
);
1708 if (! NILP (b
->zv_marker
))
1710 BUF_ZV (b
) = marker_position (b
->zv_marker
);
1711 BUF_ZV_BYTE (b
) = marker_byte_position (b
->zv_marker
);
1715 DEFUN ("set-buffer", Fset_buffer
, Sset_buffer
, 1, 1, 0,
1716 "Make the buffer BUFFER current for editing operations.\n\
1717 BUFFER may be a buffer or the name of an existing buffer.\n\
1718 See also `save-excursion' when you want to make a buffer current temporarily.\n\
1719 This function does not display the buffer, so its effect ends\n\
1720 when the current command terminates.\n\
1721 Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.")
1723 register Lisp_Object buffer
;
1725 register Lisp_Object buf
;
1726 buf
= Fget_buffer (buffer
);
1729 if (NILP (XBUFFER (buf
)->name
))
1730 error ("Selecting deleted buffer");
1731 set_buffer_internal (XBUFFER (buf
));
1735 /* Set the current buffer to BUFFER provided it is alive. */
1738 set_buffer_if_live (buffer
)
1741 if (! NILP (XBUFFER (buffer
)->name
))
1742 Fset_buffer (buffer
);
1746 DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only
,
1747 Sbarf_if_buffer_read_only
, 0, 0, 0,
1748 "Signal a `buffer-read-only' error if the current buffer is read-only.")
1751 if (!NILP (current_buffer
->read_only
)
1752 && NILP (Vinhibit_read_only
))
1753 Fsignal (Qbuffer_read_only
, (Fcons (Fcurrent_buffer (), Qnil
)));
1757 DEFUN ("bury-buffer", Fbury_buffer
, Sbury_buffer
, 0, 1, "",
1758 "Put BUFFER at the end of the list of all buffers.\n\
1759 There it is the least likely candidate for `other-buffer' to return;\n\
1760 thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\
1761 If BUFFER is nil or omitted, bury the current buffer.\n\
1762 Also, if BUFFER is nil or omitted, remove the current buffer from the\n\
1763 selected window if it is displayed there.")
1765 register Lisp_Object buffer
;
1767 /* Figure out what buffer we're going to bury. */
1770 XSETBUFFER (buffer
, current_buffer
);
1772 /* If we're burying the current buffer, unshow it. */
1773 Fswitch_to_buffer (Fother_buffer (buffer
, Qnil
, Qnil
), Qnil
);
1779 buf1
= Fget_buffer (buffer
);
1785 /* Move buffer to the end of the buffer list. Do nothing if the
1786 buffer is killed. */
1787 if (!NILP (XBUFFER (buffer
)->name
))
1789 Lisp_Object aelt
, link
;
1791 aelt
= Frassq (buffer
, Vbuffer_alist
);
1792 link
= Fmemq (aelt
, Vbuffer_alist
);
1793 Vbuffer_alist
= Fdelq (aelt
, Vbuffer_alist
);
1795 Vbuffer_alist
= nconc2 (Vbuffer_alist
, link
);
1797 frames_bury_buffer (buffer
);
1803 DEFUN ("erase-buffer", Ferase_buffer
, Serase_buffer
, 0, 0, "*",
1804 "Delete the entire contents of the current buffer.\n\
1805 Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\
1806 so the buffer is truly empty after this.")
1813 current_buffer
->last_window_start
= 1;
1814 /* Prevent warnings, or suspension of auto saving, that would happen
1815 if future size is less than past size. Use of erase-buffer
1816 implies that the future text is not really related to the past text. */
1817 XSETFASTINT (current_buffer
->save_length
, 0);
1822 validate_region (b
, e
)
1823 register Lisp_Object
*b
, *e
;
1825 CHECK_NUMBER_COERCE_MARKER (*b
, 0);
1826 CHECK_NUMBER_COERCE_MARKER (*e
, 1);
1828 if (XINT (*b
) > XINT (*e
))
1831 tem
= *b
; *b
= *e
; *e
= tem
;
1834 if (!(BEGV
<= XINT (*b
) && XINT (*b
) <= XINT (*e
)
1835 && XINT (*e
) <= ZV
))
1836 args_out_of_range (*b
, *e
);
1839 /* Advance BYTE_POS up to a character boundary
1840 and return the adjusted position. */
1843 advance_to_char_boundary (byte_pos
)
1848 if (byte_pos
== BEG
)
1849 /* Beginning of buffer is always a character boundary. */
1852 c
= FETCH_BYTE (byte_pos
);
1853 if (! CHAR_HEAD_P (c
))
1855 /* We should advance BYTE_POS only when C is a constituent of a
1856 multibyte sequence. */
1857 int orig_byte_pos
= byte_pos
;
1862 c
= FETCH_BYTE (byte_pos
);
1864 while (! CHAR_HEAD_P (c
) && byte_pos
> BEG
);
1866 if (byte_pos
< orig_byte_pos
)
1867 byte_pos
= orig_byte_pos
;
1868 /* If C is a constituent of a multibyte sequence, BYTE_POS was
1869 surely advance to the correct character boundary. If C is
1870 not, BYTE_POS was unchanged. */
1876 DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte
, Sset_buffer_multibyte
,
1878 "Set the multibyte flag of the current buffer to FLAG.\n\
1879 If FLAG is t, this makes the buffer a multibyte buffer.\n\
1880 If FLAG is nil, this makes the buffer a single-byte buffer.\n\
1881 The buffer contents remain unchanged as a sequence of bytes\n\
1882 but the contents viewed as characters do change.")
1886 Lisp_Object tail
, markers
;
1887 struct buffer
*other
;
1888 int undo_enabled_p
= !EQ (current_buffer
->undo_list
, Qt
);
1889 int begv
= BEGV
, zv
= ZV
;
1890 int narrowed
= (BEG
!= begv
|| Z
!= zv
);
1891 int modified_p
= !NILP (Fbuffer_modified_p (Qnil
));
1893 if (current_buffer
->base_buffer
)
1894 error ("Cannot do `set-buffer-multibyte' on an indirect buffer");
1896 /* Do nothing if nothing actually changes. */
1897 if (NILP (flag
) == NILP (current_buffer
->enable_multibyte_characters
))
1900 /* It would be better to update the list,
1901 but this is good enough for now. */
1903 current_buffer
->undo_list
= Qt
;
1905 /* If the cached position is for this buffer, clear it out. */
1906 clear_charpos_cache (current_buffer
);
1916 /* Do this first, so it can use CHAR_TO_BYTE
1917 to calculate the old correspondences. */
1918 set_intervals_multibyte (0);
1920 current_buffer
->enable_multibyte_characters
= Qnil
;
1926 TEMP_SET_PT_BOTH (PT_BYTE
, PT_BYTE
);
1928 tail
= BUF_MARKERS (current_buffer
);
1929 while (! NILP (tail
))
1931 XMARKER (tail
)->charpos
= XMARKER (tail
)->bytepos
;
1932 tail
= XMARKER (tail
)->chain
;
1935 /* Convert multibyte form of 8-bit characters to unibyte. */
1950 if (MULTIBYTE_STR_AS_UNIBYTE_P (p
, bytes
))
1951 p
+= bytes
, pos
+= bytes
;
1954 c
= STRING_CHAR (p
, stop
- pos
);
1955 /* Delete all bytes for this 8-bit character but the
1956 last one, and change the last one to the charcter
1959 del_range_2 (pos
, pos
, pos
+ bytes
, pos
+ bytes
, 0);
1971 Fnarrow_to_region (make_number (begv
), make_number (zv
));
1979 /* Be sure not to have a multibyte sequence striding over the GAP.
1980 Ex: We change this: "...abc\201 _GAP_ \241def..."
1981 to: "...abc _GAP_ \201\241def..." */
1983 if (GPT_BYTE
> 1 && GPT_BYTE
< Z_BYTE
1984 && ! CHAR_HEAD_P (*(GAP_END_ADDR
)))
1986 unsigned char *p
= GPT_ADDR
- 1;
1988 while (! CHAR_HEAD_P (*p
) && p
> BEG_ADDR
) p
--;
1989 if (BASE_LEADING_CODE_P (*p
))
1991 int new_gpt
= GPT_BYTE
- (GPT_ADDR
- p
);
1993 move_gap_both (new_gpt
, new_gpt
);
1997 /* Make the buffer contents valid as multibyte by converting
1998 8-bit characters to multibyte form. */
2014 if (UNIBYTE_STR_AS_MULTIBYTE_P (p
, stop
- pos
, bytes
))
2015 p
+= bytes
, pos
+= bytes
;
2018 unsigned char tmp
[MAX_MULTIBYTE_LENGTH
];
2020 bytes
= CHAR_STRING (*p
, tmp
);
2022 TEMP_SET_PT_BOTH (pos
+ 1, pos
+ 1);
2024 insert_1_both (tmp
+ 1, bytes
, bytes
, 1, 0, 0);
2025 /* Now the gap is after the just inserted data. */
2042 Fnarrow_to_region (make_number (begv
), make_number (zv
));
2044 /* Do this first, so that chars_in_text asks the right question.
2045 set_intervals_multibyte needs it too. */
2046 current_buffer
->enable_multibyte_characters
= Qt
;
2048 GPT_BYTE
= advance_to_char_boundary (GPT_BYTE
);
2049 GPT
= chars_in_text (BEG_ADDR
, GPT_BYTE
- BEG_BYTE
) + BEG
;
2051 Z
= chars_in_text (GAP_END_ADDR
, Z_BYTE
- GPT_BYTE
) + GPT
;
2053 BEGV_BYTE
= advance_to_char_boundary (BEGV_BYTE
);
2054 if (BEGV_BYTE
> GPT_BYTE
)
2055 BEGV
= chars_in_text (GAP_END_ADDR
, BEGV_BYTE
- GPT_BYTE
) + GPT
;
2057 BEGV
= chars_in_text (BEG_ADDR
, BEGV_BYTE
- BEG_BYTE
) + BEG
;
2059 ZV_BYTE
= advance_to_char_boundary (ZV_BYTE
);
2060 if (ZV_BYTE
> GPT_BYTE
)
2061 ZV
= chars_in_text (GAP_END_ADDR
, ZV_BYTE
- GPT_BYTE
) + GPT
;
2063 ZV
= chars_in_text (BEG_ADDR
, ZV_BYTE
- BEG_BYTE
) + BEG
;
2066 int pt_byte
= advance_to_char_boundary (PT_BYTE
);
2069 if (pt_byte
> GPT_BYTE
)
2070 pt
= chars_in_text (GAP_END_ADDR
, pt_byte
- GPT_BYTE
) + GPT
;
2072 pt
= chars_in_text (BEG_ADDR
, pt_byte
- BEG_BYTE
) + BEG
;
2073 TEMP_SET_PT_BOTH (pt
, pt_byte
);
2076 tail
= markers
= BUF_MARKERS (current_buffer
);
2078 /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from
2079 getting confused by the markers that have not yet been updated.
2080 It is also a signal that it should never create a marker. */
2081 BUF_MARKERS (current_buffer
) = Qnil
;
2083 while (! NILP (tail
))
2085 XMARKER (tail
)->bytepos
2086 = advance_to_char_boundary (XMARKER (tail
)->bytepos
);
2087 XMARKER (tail
)->charpos
= BYTE_TO_CHAR (XMARKER (tail
)->bytepos
);
2089 tail
= XMARKER (tail
)->chain
;
2092 /* Make sure no markers were put on the chain
2093 while the chain value was incorrect. */
2094 if (! EQ (BUF_MARKERS (current_buffer
), Qnil
))
2097 BUF_MARKERS (current_buffer
) = markers
;
2099 /* Do this last, so it can calculate the new correspondences
2100 between chars and bytes. */
2101 set_intervals_multibyte (1);
2105 current_buffer
->undo_list
= Qnil
;
2107 /* Changing the multibyteness of a buffer means that all windows
2108 showing that buffer must be updated thoroughly. */
2109 current_buffer
->prevent_redisplay_optimizations_p
= 1;
2110 ++windows_or_buffers_changed
;
2112 /* Copy this buffer's new multibyte status
2113 into all of its indirect buffers. */
2114 for (other
= all_buffers
; other
; other
= other
->next
)
2115 if (other
->base_buffer
== current_buffer
&& !NILP (other
->name
))
2117 other
->enable_multibyte_characters
2118 = current_buffer
->enable_multibyte_characters
;
2119 other
->prevent_redisplay_optimizations_p
= 1;
2122 /* Restore the modifiedness of the buffer. */
2123 if (!modified_p
&& !NILP (Fbuffer_modified_p (Qnil
)))
2124 Fset_buffer_modified_p (Qnil
);
2129 DEFUN ("kill-all-local-variables", Fkill_all_local_variables
, Skill_all_local_variables
,
2131 "Switch to Fundamental mode by killing current buffer's local variables.\n\
2132 Most local variable bindings are eliminated so that the default values\n\
2133 become effective once more. Also, the syntax table is set from\n\
2134 `standard-syntax-table', the local keymap is set to nil,\n\
2135 and the abbrev table from `fundamental-mode-abbrev-table'.\n\
2136 This function also forces redisplay of the mode line.\n\
2138 Every function to select a new major mode starts by\n\
2139 calling this function.\n\n\
2140 As a special exception, local variables whose names have\n\
2141 a non-nil `permanent-local' property are not eliminated by this function.\n\
2143 The first thing this function does is run\n\
2144 the normal hook `change-major-mode-hook'.")
2147 register Lisp_Object alist
, sym
, tem
;
2150 if (!NILP (Vrun_hooks
))
2151 call1 (Vrun_hooks
, intern ("change-major-mode-hook"));
2152 oalist
= current_buffer
->local_var_alist
;
2154 /* Make sure none of the bindings in oalist
2155 remain swapped in, in their symbols. */
2157 swap_out_buffer_local_variables (current_buffer
);
2159 /* Actually eliminate all local bindings of this buffer. */
2161 reset_buffer_local_variables (current_buffer
, 0);
2163 /* Redisplay mode lines; we are changing major mode. */
2165 update_mode_lines
++;
2167 /* Any which are supposed to be permanent,
2168 make local again, with the same values they had. */
2170 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2172 sym
= XCAR (XCAR (alist
));
2173 tem
= Fget (sym
, Qpermanent_local
);
2176 Fmake_local_variable (sym
);
2177 Fset (sym
, XCDR (XCAR (alist
)));
2181 /* Force mode-line redisplay. Useful here because all major mode
2182 commands call this function. */
2183 update_mode_lines
++;
2188 /* Make sure no local variables remain set up with buffer B
2189 for their current values. */
2192 swap_out_buffer_local_variables (b
)
2195 Lisp_Object oalist
, alist
, sym
, tem
, buffer
;
2197 XSETBUFFER (buffer
, b
);
2198 oalist
= b
->local_var_alist
;
2200 for (alist
= oalist
; !NILP (alist
); alist
= XCDR (alist
))
2202 sym
= XCAR (XCAR (alist
));
2204 /* Need not do anything if some other buffer's binding is now encached. */
2205 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
;
2206 if (BUFFERP (tem
) && XBUFFER (tem
) == current_buffer
)
2208 /* Symbol is set up for this buffer's old local value.
2209 Set it up for the current buffer with the default value. */
2211 tem
= XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->cdr
;
2212 /* Store the symbol's current value into the alist entry
2213 it is currently set up for. This is so that, if the
2214 local is marked permanent, and we make it local again
2215 later in Fkill_all_local_variables, we don't lose the value. */
2217 = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
);
2218 /* Switch to the symbol's default-value alist entry. */
2220 /* Mark it as current for buffer B. */
2221 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->buffer
= buffer
;
2222 /* Store the current value into any forwarding in the symbol. */
2223 store_symval_forwarding (sym
,
2224 XBUFFER_LOCAL_VALUE (XSYMBOL (sym
)->value
)->realvalue
,
2230 /* Find all the overlays in the current buffer that contain position POS.
2231 Return the number found, and store them in a vector in *VEC_PTR.
2232 Store in *LEN_PTR the size allocated for the vector.
2233 Store in *NEXT_PTR the next position after POS where an overlay starts,
2234 or ZV if there are no more overlays.
2235 Store in *PREV_PTR the previous position before POS where an overlay ends,
2236 or where an overlay starts which ends at or after POS;
2237 or BEGV if there are no such overlays.
2238 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2240 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2241 when this function is called.
2243 If EXTEND is non-zero, we make the vector bigger if necessary.
2244 If EXTEND is zero, we never extend the vector,
2245 and we store only as many overlays as will fit.
2246 But we still return the total number of overlays.
2248 If CHANGE_REQ is true, then any position written into *PREV_PTR or
2249 *NEXT_PTR is guaranteed to be not equal to POS, unless it is the
2250 default (BEGV or ZV). */
2253 overlays_at (pos
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
, change_req
)
2256 Lisp_Object
**vec_ptr
;
2262 Lisp_Object tail
, overlay
, start
, end
;
2265 Lisp_Object
*vec
= *vec_ptr
;
2268 int inhibit_storing
= 0;
2270 for (tail
= current_buffer
->overlays_before
;
2274 int startpos
, endpos
;
2276 overlay
= XCAR (tail
);
2278 start
= OVERLAY_START (overlay
);
2279 end
= OVERLAY_END (overlay
);
2280 endpos
= OVERLAY_POSITION (end
);
2287 startpos
= OVERLAY_POSITION (start
);
2288 /* This one ends at or after POS
2289 so its start counts for PREV_PTR if it's before POS. */
2290 if (prev
< startpos
&& startpos
< pos
)
2294 if (startpos
<= pos
)
2298 /* The supplied vector is full.
2299 Either make it bigger, or don't store any more in it. */
2302 /* Make it work with an initial len == 0. */
2307 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2311 inhibit_storing
= 1;
2314 if (!inhibit_storing
)
2316 /* Keep counting overlays even if we can't return them all. */
2319 else if (startpos
< next
)
2323 for (tail
= current_buffer
->overlays_after
;
2327 int startpos
, endpos
;
2329 overlay
= XCAR (tail
);
2331 start
= OVERLAY_START (overlay
);
2332 end
= OVERLAY_END (overlay
);
2333 startpos
= OVERLAY_POSITION (start
);
2336 if (startpos
< next
)
2340 endpos
= OVERLAY_POSITION (end
);
2347 *len_ptr
= len
*= 2;
2350 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2354 inhibit_storing
= 1;
2357 if (!inhibit_storing
)
2361 if (startpos
< pos
&& startpos
> prev
)
2364 else if (endpos
< pos
&& endpos
> prev
)
2366 else if (endpos
== pos
&& startpos
> prev
2367 && (!change_req
|| startpos
< pos
))
2378 /* Find all the overlays in the current buffer that overlap the range BEG-END
2379 or are empty at BEG.
2381 Return the number found, and store them in a vector in *VEC_PTR.
2382 Store in *LEN_PTR the size allocated for the vector.
2383 Store in *NEXT_PTR the next position after POS where an overlay starts,
2384 or ZV if there are no more overlays.
2385 Store in *PREV_PTR the previous position before POS where an overlay ends,
2386 or BEGV if there are no previous overlays.
2387 NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info.
2389 *VEC_PTR and *LEN_PTR should contain a valid vector and size
2390 when this function is called.
2392 If EXTEND is non-zero, we make the vector bigger if necessary.
2393 If EXTEND is zero, we never extend the vector,
2394 and we store only as many overlays as will fit.
2395 But we still return the total number of overlays. */
2398 overlays_in (beg
, end
, extend
, vec_ptr
, len_ptr
, next_ptr
, prev_ptr
)
2401 Lisp_Object
**vec_ptr
;
2406 Lisp_Object tail
, overlay
, ostart
, oend
;
2409 Lisp_Object
*vec
= *vec_ptr
;
2412 int inhibit_storing
= 0;
2414 for (tail
= current_buffer
->overlays_before
;
2418 int startpos
, endpos
;
2420 overlay
= XCAR (tail
);
2422 ostart
= OVERLAY_START (overlay
);
2423 oend
= OVERLAY_END (overlay
);
2424 endpos
= OVERLAY_POSITION (oend
);
2431 startpos
= OVERLAY_POSITION (ostart
);
2432 /* Count an interval if it either overlaps the range
2433 or is empty at the start of the range. */
2434 if ((beg
< endpos
&& startpos
< end
)
2435 || (startpos
== endpos
&& beg
== endpos
))
2439 /* The supplied vector is full.
2440 Either make it bigger, or don't store any more in it. */
2443 *len_ptr
= len
*= 2;
2444 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2448 inhibit_storing
= 1;
2451 if (!inhibit_storing
)
2453 /* Keep counting overlays even if we can't return them all. */
2456 else if (startpos
< next
)
2460 for (tail
= current_buffer
->overlays_after
;
2464 int startpos
, endpos
;
2466 overlay
= XCAR (tail
);
2468 ostart
= OVERLAY_START (overlay
);
2469 oend
= OVERLAY_END (overlay
);
2470 startpos
= OVERLAY_POSITION (ostart
);
2473 if (startpos
< next
)
2477 endpos
= OVERLAY_POSITION (oend
);
2478 /* Count an interval if it either overlaps the range
2479 or is empty at the start of the range. */
2480 if ((beg
< endpos
&& startpos
< end
)
2481 || (startpos
== endpos
&& beg
== endpos
))
2487 *len_ptr
= len
*= 2;
2488 vec
= (Lisp_Object
*) xrealloc (vec
, len
* sizeof (Lisp_Object
));
2492 inhibit_storing
= 1;
2495 if (!inhibit_storing
)
2499 else if (endpos
< beg
&& endpos
> prev
)
2510 /* Fast function to just test if we're at an overlay boundary. */
2512 overlay_touches_p (pos
)
2515 Lisp_Object tail
, overlay
;
2517 for (tail
= current_buffer
->overlays_before
; GC_CONSP (tail
);
2522 overlay
= XCAR (tail
);
2523 if (!GC_OVERLAYP (overlay
))
2526 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2529 if (endpos
== pos
|| OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
)
2533 for (tail
= current_buffer
->overlays_after
; GC_CONSP (tail
);
2538 overlay
= XCAR (tail
);
2539 if (!GC_OVERLAYP (overlay
))
2542 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2545 if (startpos
== pos
|| OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
)
2553 Lisp_Object overlay
;
2559 compare_overlays (v1
, v2
)
2560 const void *v1
, *v2
;
2562 const struct sortvec
*s1
= (const struct sortvec
*) v1
;
2563 const struct sortvec
*s2
= (const struct sortvec
*) v2
;
2564 if (s1
->priority
!= s2
->priority
)
2565 return s1
->priority
- s2
->priority
;
2566 if (s1
->beg
!= s2
->beg
)
2567 return s1
->beg
- s2
->beg
;
2568 if (s1
->end
!= s2
->end
)
2569 return s2
->end
- s1
->end
;
2573 /* Sort an array of overlays by priority. The array is modified in place.
2574 The return value is the new size; this may be smaller than the original
2575 size if some of the overlays were invalid or were window-specific. */
2577 sort_overlays (overlay_vec
, noverlays
, w
)
2578 Lisp_Object
*overlay_vec
;
2583 struct sortvec
*sortvec
;
2584 sortvec
= (struct sortvec
*) alloca (noverlays
* sizeof (struct sortvec
));
2586 /* Put the valid and relevant overlays into sortvec. */
2588 for (i
= 0, j
= 0; i
< noverlays
; i
++)
2591 Lisp_Object overlay
;
2593 overlay
= overlay_vec
[i
];
2594 if (OVERLAY_VALID (overlay
)
2595 && OVERLAY_POSITION (OVERLAY_START (overlay
)) > 0
2596 && OVERLAY_POSITION (OVERLAY_END (overlay
)) > 0)
2598 /* If we're interested in a specific window, then ignore
2599 overlays that are limited to some other window. */
2604 window
= Foverlay_get (overlay
, Qwindow
);
2605 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2609 /* This overlay is good and counts: put it into sortvec. */
2610 sortvec
[j
].overlay
= overlay
;
2611 sortvec
[j
].beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2612 sortvec
[j
].end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2613 tem
= Foverlay_get (overlay
, Qpriority
);
2615 sortvec
[j
].priority
= XINT (tem
);
2617 sortvec
[j
].priority
= 0;
2623 /* Sort the overlays into the proper order: increasing priority. */
2626 qsort (sortvec
, noverlays
, sizeof (struct sortvec
), compare_overlays
);
2628 for (i
= 0; i
< noverlays
; i
++)
2629 overlay_vec
[i
] = sortvec
[i
].overlay
;
2635 Lisp_Object string
, string2
;
2642 struct sortstr
*buf
; /* An array that expands as needed; never freed. */
2643 int size
; /* Allocated length of that array. */
2644 int used
; /* How much of the array is currently in use. */
2645 int bytes
; /* Total length of the strings in buf. */
2648 /* Buffers for storing information about the overlays touching a given
2649 position. These could be automatic variables in overlay_strings, but
2650 it's more efficient to hold onto the memory instead of repeatedly
2651 allocating and freeing it. */
2652 static struct sortstrlist overlay_heads
, overlay_tails
;
2653 static unsigned char *overlay_str_buf
;
2655 /* Allocated length of overlay_str_buf. */
2656 static int overlay_str_len
;
2658 /* A comparison function suitable for passing to qsort. */
2660 cmp_for_strings (as1
, as2
)
2663 struct sortstr
*s1
= (struct sortstr
*)as1
;
2664 struct sortstr
*s2
= (struct sortstr
*)as2
;
2665 if (s1
->size
!= s2
->size
)
2666 return s2
->size
- s1
->size
;
2667 if (s1
->priority
!= s2
->priority
)
2668 return s1
->priority
- s2
->priority
;
2673 record_overlay_string (ssl
, str
, str2
, pri
, size
)
2674 struct sortstrlist
*ssl
;
2675 Lisp_Object str
, str2
, pri
;
2680 if (ssl
->used
== ssl
->size
)
2686 ssl
->buf
= ((struct sortstr
*)
2687 xrealloc (ssl
->buf
, ssl
->size
* sizeof (struct sortstr
)));
2689 ssl
->buf
[ssl
->used
].string
= str
;
2690 ssl
->buf
[ssl
->used
].string2
= str2
;
2691 ssl
->buf
[ssl
->used
].size
= size
;
2692 ssl
->buf
[ssl
->used
].priority
= (INTEGERP (pri
) ? XINT (pri
) : 0);
2695 if (NILP (current_buffer
->enable_multibyte_characters
))
2696 nbytes
= XSTRING (str
)->size
;
2697 else if (! STRING_MULTIBYTE (str
))
2698 nbytes
= count_size_as_multibyte (XSTRING (str
)->data
,
2699 STRING_BYTES (XSTRING (str
)));
2701 nbytes
= STRING_BYTES (XSTRING (str
));
2703 ssl
->bytes
+= nbytes
;
2707 if (NILP (current_buffer
->enable_multibyte_characters
))
2708 nbytes
= XSTRING (str2
)->size
;
2709 else if (! STRING_MULTIBYTE (str2
))
2710 nbytes
= count_size_as_multibyte (XSTRING (str2
)->data
,
2711 STRING_BYTES (XSTRING (str2
)));
2713 nbytes
= STRING_BYTES (XSTRING (str2
));
2715 ssl
->bytes
+= nbytes
;
2719 /* Return the concatenation of the strings associated with overlays that
2720 begin or end at POS, ignoring overlays that are specific to a window
2721 other than W. The strings are concatenated in the appropriate order:
2722 shorter overlays nest inside longer ones, and higher priority inside
2723 lower. Normally all of the after-strings come first, but zero-sized
2724 overlays have their after-strings ride along with the before-strings
2725 because it would look strange to print them inside-out.
2727 Returns the string length, and stores the contents indirectly through
2728 PSTR, if that variable is non-null. The string may be overwritten by
2729 subsequent calls. */
2732 overlay_strings (pos
, w
, pstr
)
2735 unsigned char **pstr
;
2737 Lisp_Object ov
, overlay
, window
, str
;
2738 int startpos
, endpos
;
2739 int multibyte
= ! NILP (current_buffer
->enable_multibyte_characters
);
2741 overlay_heads
.used
= overlay_heads
.bytes
= 0;
2742 overlay_tails
.used
= overlay_tails
.bytes
= 0;
2743 for (ov
= current_buffer
->overlays_before
; CONSP (ov
); ov
= XCDR (ov
))
2745 overlay
= XCAR (ov
);
2746 if (!OVERLAYP (overlay
))
2749 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2750 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2753 if (endpos
!= pos
&& startpos
!= pos
)
2755 window
= Foverlay_get (overlay
, Qwindow
);
2756 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2759 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2760 record_overlay_string (&overlay_heads
, str
,
2762 ? Foverlay_get (overlay
, Qafter_string
)
2764 Foverlay_get (overlay
, Qpriority
),
2766 else if (endpos
== pos
2767 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2768 record_overlay_string (&overlay_tails
, str
, Qnil
,
2769 Foverlay_get (overlay
, Qpriority
),
2772 for (ov
= current_buffer
->overlays_after
; CONSP (ov
); ov
= XCDR (ov
))
2774 overlay
= XCAR (ov
);
2775 if (!OVERLAYP (overlay
))
2778 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
2779 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
2782 if (endpos
!= pos
&& startpos
!= pos
)
2784 window
= Foverlay_get (overlay
, Qwindow
);
2785 if (WINDOWP (window
) && XWINDOW (window
) != w
)
2788 && (str
= Foverlay_get (overlay
, Qbefore_string
), STRINGP (str
)))
2789 record_overlay_string (&overlay_heads
, str
,
2791 ? Foverlay_get (overlay
, Qafter_string
)
2793 Foverlay_get (overlay
, Qpriority
),
2795 else if (endpos
== pos
2796 && (str
= Foverlay_get (overlay
, Qafter_string
), STRINGP (str
)))
2797 record_overlay_string (&overlay_tails
, str
, Qnil
,
2798 Foverlay_get (overlay
, Qpriority
),
2801 if (overlay_tails
.used
> 1)
2802 qsort (overlay_tails
.buf
, overlay_tails
.used
, sizeof (struct sortstr
),
2804 if (overlay_heads
.used
> 1)
2805 qsort (overlay_heads
.buf
, overlay_heads
.used
, sizeof (struct sortstr
),
2807 if (overlay_heads
.bytes
|| overlay_tails
.bytes
)
2812 int total
= overlay_heads
.bytes
+ overlay_tails
.bytes
;
2814 if (total
> overlay_str_len
)
2816 overlay_str_len
= total
;
2817 overlay_str_buf
= (unsigned char *)xrealloc (overlay_str_buf
,
2820 p
= overlay_str_buf
;
2821 for (i
= overlay_tails
.used
; --i
>= 0;)
2824 tem
= overlay_tails
.buf
[i
].string
;
2825 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2826 STRING_BYTES (XSTRING (tem
)),
2827 STRING_MULTIBYTE (tem
), multibyte
);
2830 for (i
= 0; i
< overlay_heads
.used
; ++i
)
2833 tem
= overlay_heads
.buf
[i
].string
;
2834 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2835 STRING_BYTES (XSTRING (tem
)),
2836 STRING_MULTIBYTE (tem
), multibyte
);
2838 tem
= overlay_heads
.buf
[i
].string2
;
2841 nbytes
= copy_text (XSTRING (tem
)->data
, p
,
2842 STRING_BYTES (XSTRING (tem
)),
2843 STRING_MULTIBYTE (tem
), multibyte
);
2847 if (p
!= overlay_str_buf
+ total
)
2850 *pstr
= overlay_str_buf
;
2856 /* Shift overlays in BUF's overlay lists, to center the lists at POS. */
2859 recenter_overlay_lists (buf
, pos
)
2863 Lisp_Object overlay
, tail
, next
, prev
, beg
, end
;
2865 /* See if anything in overlays_before should move to overlays_after. */
2867 /* We don't strictly need prev in this loop; it should always be nil.
2868 But we use it for symmetry and in case that should cease to be true
2869 with some future change. */
2871 for (tail
= buf
->overlays_before
;
2873 prev
= tail
, tail
= next
)
2876 overlay
= XCAR (tail
);
2878 /* If the overlay is not valid, get rid of it. */
2879 if (!OVERLAY_VALID (overlay
))
2884 /* Splice the cons cell TAIL out of overlays_before. */
2888 buf
->overlays_before
= next
;
2894 beg
= OVERLAY_START (overlay
);
2895 end
= OVERLAY_END (overlay
);
2897 if (OVERLAY_POSITION (end
) > pos
)
2899 /* OVERLAY needs to be moved. */
2900 int where
= OVERLAY_POSITION (beg
);
2901 Lisp_Object other
, other_prev
;
2903 /* Splice the cons cell TAIL out of overlays_before. */
2907 buf
->overlays_before
= next
;
2909 /* Search thru overlays_after for where to put it. */
2911 for (other
= buf
->overlays_after
;
2913 other_prev
= other
, other
= XCDR (other
))
2915 Lisp_Object otherbeg
, otheroverlay
;
2917 otheroverlay
= XCAR (other
);
2918 if (! OVERLAY_VALID (otheroverlay
))
2921 otherbeg
= OVERLAY_START (otheroverlay
);
2922 if (OVERLAY_POSITION (otherbeg
) >= where
)
2926 /* Add TAIL to overlays_after before OTHER. */
2927 XCDR (tail
) = other
;
2928 if (!NILP (other_prev
))
2929 XCDR (other_prev
) = tail
;
2931 buf
->overlays_after
= tail
;
2935 /* We've reached the things that should stay in overlays_before.
2936 All the rest of overlays_before must end even earlier,
2941 /* See if anything in overlays_after should be in overlays_before. */
2943 for (tail
= buf
->overlays_after
;
2945 prev
= tail
, tail
= next
)
2948 overlay
= XCAR (tail
);
2950 /* If the overlay is not valid, get rid of it. */
2951 if (!OVERLAY_VALID (overlay
))
2956 /* Splice the cons cell TAIL out of overlays_after. */
2960 buf
->overlays_after
= next
;
2966 beg
= OVERLAY_START (overlay
);
2967 end
= OVERLAY_END (overlay
);
2969 /* Stop looking, when we know that nothing further
2970 can possibly end before POS. */
2971 if (OVERLAY_POSITION (beg
) > pos
)
2974 if (OVERLAY_POSITION (end
) <= pos
)
2976 /* OVERLAY needs to be moved. */
2977 int where
= OVERLAY_POSITION (end
);
2978 Lisp_Object other
, other_prev
;
2980 /* Splice the cons cell TAIL out of overlays_after. */
2984 buf
->overlays_after
= next
;
2986 /* Search thru overlays_before for where to put it. */
2988 for (other
= buf
->overlays_before
;
2990 other_prev
= other
, other
= XCDR (other
))
2992 Lisp_Object otherend
, otheroverlay
;
2994 otheroverlay
= XCAR (other
);
2995 if (! OVERLAY_VALID (otheroverlay
))
2998 otherend
= OVERLAY_END (otheroverlay
);
2999 if (OVERLAY_POSITION (otherend
) <= where
)
3003 /* Add TAIL to overlays_before before OTHER. */
3004 XCDR (tail
) = other
;
3005 if (!NILP (other_prev
))
3006 XCDR (other_prev
) = tail
;
3008 buf
->overlays_before
= tail
;
3013 XSETFASTINT (buf
->overlay_center
, pos
);
3017 adjust_overlays_for_insert (pos
, length
)
3021 /* After an insertion, the lists are still sorted properly,
3022 but we may need to update the value of the overlay center. */
3023 if (XFASTINT (current_buffer
->overlay_center
) >= pos
)
3024 XSETFASTINT (current_buffer
->overlay_center
,
3025 XFASTINT (current_buffer
->overlay_center
) + length
);
3029 adjust_overlays_for_delete (pos
, length
)
3033 if (XFASTINT (current_buffer
->overlay_center
) < pos
)
3034 /* The deletion was to our right. No change needed; the before- and
3035 after-lists are still consistent. */
3037 else if (XFASTINT (current_buffer
->overlay_center
) > pos
+ length
)
3038 /* The deletion was to our left. We need to adjust the center value
3039 to account for the change in position, but the lists are consistent
3040 given the new value. */
3041 XSETFASTINT (current_buffer
->overlay_center
,
3042 XFASTINT (current_buffer
->overlay_center
) - length
);
3044 /* We're right in the middle. There might be things on the after-list
3045 that now belong on the before-list. Recentering will move them,
3046 and also update the center point. */
3047 recenter_overlay_lists (current_buffer
, pos
);
3050 /* Fix up overlays that were garbled as a result of permuting markers
3051 in the range START through END. Any overlay with at least one
3052 endpoint in this range will need to be unlinked from the overlay
3053 list and reinserted in its proper place.
3054 Such an overlay might even have negative size at this point.
3055 If so, we'll reverse the endpoints. Can you think of anything
3056 better to do in this situation? */
3058 fix_overlays_in_range (start
, end
)
3059 register int start
, end
;
3061 Lisp_Object overlay
;
3062 Lisp_Object before_list
, after_list
;
3063 Lisp_Object
*ptail
, *pbefore
= &before_list
, *pafter
= &after_list
;
3064 int startpos
, endpos
;
3066 /* This algorithm shifts links around instead of consing and GCing.
3067 The loop invariant is that before_list (resp. after_list) is a
3068 well-formed list except that its last element, the one that
3069 *pbefore (resp. *pafter) points to, is still uninitialized.
3070 So it's not a bug that before_list isn't initialized, although
3071 it may look strange. */
3072 for (ptail
= ¤t_buffer
->overlays_before
; CONSP (*ptail
);)
3074 overlay
= XCAR (*ptail
);
3075 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3078 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3080 || (startpos
>= start
&& startpos
< end
))
3082 /* If the overlay is backwards, fix that now. */
3083 if (startpos
> endpos
)
3086 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3088 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3090 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3092 /* Add it to the end of the wrong list. Later on,
3093 recenter_overlay_lists will move it to the right place. */
3094 if (endpos
< XINT (current_buffer
->overlay_center
))
3097 pafter
= &XCDR (*ptail
);
3102 pbefore
= &XCDR (*ptail
);
3104 *ptail
= XCDR (*ptail
);
3107 ptail
= &XCDR (*ptail
);
3109 for (ptail
= ¤t_buffer
->overlays_after
; CONSP (*ptail
);)
3111 overlay
= XCAR (*ptail
);
3112 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3113 if (startpos
>= end
)
3115 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3116 if (startpos
>= start
3117 || (endpos
>= start
&& endpos
< end
))
3119 if (startpos
> endpos
)
3122 Fset_marker (OVERLAY_START (overlay
), make_number (endpos
),
3124 Fset_marker (OVERLAY_END (overlay
), make_number (startpos
),
3126 tem
= startpos
; startpos
= endpos
; endpos
= tem
;
3128 if (endpos
< XINT (current_buffer
->overlay_center
))
3131 pafter
= &XCDR (*ptail
);
3136 pbefore
= &XCDR (*ptail
);
3138 *ptail
= XCDR (*ptail
);
3141 ptail
= &XCDR (*ptail
);
3144 /* Splice the constructed (wrong) lists into the buffer's lists,
3145 and let the recenter function make it sane again. */
3146 *pbefore
= current_buffer
->overlays_before
;
3147 current_buffer
->overlays_before
= before_list
;
3148 recenter_overlay_lists (current_buffer
,
3149 XINT (current_buffer
->overlay_center
));
3151 *pafter
= current_buffer
->overlays_after
;
3152 current_buffer
->overlays_after
= after_list
;
3153 recenter_overlay_lists (current_buffer
,
3154 XINT (current_buffer
->overlay_center
));
3157 /* We have two types of overlay: the one whose ending marker is
3158 after-insertion-marker (this is the usual case) and the one whose
3159 ending marker is before-insertion-marker. When `overlays_before'
3160 contains overlays of the latter type and the former type in this
3161 order and both overlays end at inserting position, inserting a text
3162 increases only the ending marker of the latter type, which results
3163 in incorrect ordering of `overlays_before'.
3165 This function fixes ordering of overlays in the slot
3166 `overlays_before' of the buffer *BP. Before the insertion, `point'
3167 was at PREV, and now is at POS. */
3170 fix_overlays_before (bp
, prev
, pos
)
3174 Lisp_Object
*tailp
= &bp
->overlays_before
;
3175 Lisp_Object
*right_place
;
3178 /* After the insertion, the several overlays may be in incorrect
3179 order. The possibility is that, in the list `overlays_before',
3180 an overlay which ends at POS appears after an overlay which ends
3181 at PREV. Since POS is greater than PREV, we must fix the
3182 ordering of these overlays, by moving overlays ends at POS before
3183 the overlays ends at PREV. */
3185 /* At first, find a place where disordered overlays should be linked
3186 in. It is where an overlay which end before POS exists. (i.e. an
3187 overlay whose ending marker is after-insertion-marker if disorder
3189 while (!NILP (*tailp
)
3190 && ((end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
))))
3192 tailp
= &XCDR (*tailp
);
3194 /* If we don't find such an overlay,
3195 or the found one ends before PREV,
3196 or the found one is the last one in the list,
3197 we don't have to fix anything. */
3200 || NILP (XCDR (*tailp
)))
3203 right_place
= tailp
;
3204 tailp
= &XCDR (*tailp
);
3206 /* Now, end position of overlays in the list *TAILP should be before
3207 or equal to PREV. In the loop, an overlay which ends at POS is
3208 moved ahead to the place pointed by RIGHT_PLACE. If we found an
3209 overlay which ends before PREV, the remaining overlays are in
3211 while (!NILP (*tailp
))
3213 end
= OVERLAY_POSITION (OVERLAY_END (XCAR (*tailp
)));
3216 { /* This overlay is disordered. */
3217 Lisp_Object found
= *tailp
;
3219 /* Unlink the found overlay. */
3220 *tailp
= XCDR (found
);
3221 /* Move an overlay at RIGHT_PLACE to the next of the found one. */
3222 XCDR (found
) = *right_place
;
3223 /* Link it into the right place. */
3224 *right_place
= found
;
3226 else if (end
== prev
)
3227 tailp
= &XCDR (*tailp
);
3228 else /* No more disordered overlay. */
3233 DEFUN ("overlayp", Foverlayp
, Soverlayp
, 1, 1, 0,
3234 "Return t if OBJECT is an overlay.")
3238 return (OVERLAYP (object
) ? Qt
: Qnil
);
3241 DEFUN ("make-overlay", Fmake_overlay
, Smake_overlay
, 2, 5, 0,
3242 "Create a new overlay with range BEG to END in BUFFER.\n\
3243 If omitted, BUFFER defaults to the current buffer.\n\
3244 BEG and END may be integers or markers.\n\
3245 The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\
3246 front delimiter advance when text is inserted there.\n\
3247 The fifth arg REAR-ADVANCE, if non-nil, makes the\n\
3248 rear delimiter advance when text is inserted there.")
3249 (beg
, end
, buffer
, front_advance
, rear_advance
)
3250 Lisp_Object beg
, end
, buffer
;
3251 Lisp_Object front_advance
, rear_advance
;
3253 Lisp_Object overlay
;
3257 XSETBUFFER (buffer
, current_buffer
);
3259 CHECK_BUFFER (buffer
, 2);
3261 && ! EQ (Fmarker_buffer (beg
), buffer
))
3262 error ("Marker points into wrong buffer");
3264 && ! EQ (Fmarker_buffer (end
), buffer
))
3265 error ("Marker points into wrong buffer");
3267 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3268 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3270 if (XINT (beg
) > XINT (end
))
3273 temp
= beg
; beg
= end
; end
= temp
;
3276 b
= XBUFFER (buffer
);
3278 beg
= Fset_marker (Fmake_marker (), beg
, buffer
);
3279 end
= Fset_marker (Fmake_marker (), end
, buffer
);
3281 if (!NILP (front_advance
))
3282 XMARKER (beg
)->insertion_type
= 1;
3283 if (!NILP (rear_advance
))
3284 XMARKER (end
)->insertion_type
= 1;
3286 overlay
= allocate_misc ();
3287 XMISCTYPE (overlay
) = Lisp_Misc_Overlay
;
3288 XOVERLAY (overlay
)->start
= beg
;
3289 XOVERLAY (overlay
)->end
= end
;
3290 XOVERLAY (overlay
)->plist
= Qnil
;
3292 /* Put the new overlay on the wrong list. */
3293 end
= OVERLAY_END (overlay
);
3294 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3295 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3297 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3299 /* This puts it in the right list, and in the right order. */
3300 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3302 /* We don't need to redisplay the region covered by the overlay, because
3303 the overlay has no properties at the moment. */
3308 /* Mark a section of BUF as needing redisplay because of overlays changes. */
3311 modify_overlay (buf
, start
, end
)
3321 start
= end
; end
= temp
;
3324 BUF_COMPUTE_UNCHANGED (buf
, start
, end
);
3326 /* If this is a buffer not in the selected window,
3327 we must do other windows. */
3328 if (buf
!= XBUFFER (XWINDOW (selected_window
)->buffer
))
3329 windows_or_buffers_changed
= 1;
3330 /* If multiple windows show this buffer, we must do other windows. */
3331 else if (buffer_shared
> 1)
3332 windows_or_buffers_changed
= 1;
3334 ++BUF_OVERLAY_MODIFF (buf
);
3338 Lisp_Object
Fdelete_overlay ();
3340 DEFUN ("move-overlay", Fmove_overlay
, Smove_overlay
, 3, 4, 0,
3341 "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\
3342 If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\
3343 If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\
3345 (overlay
, beg
, end
, buffer
)
3346 Lisp_Object overlay
, beg
, end
, buffer
;
3348 struct buffer
*b
, *ob
;
3349 Lisp_Object obuffer
;
3350 int count
= specpdl_ptr
- specpdl
;
3352 CHECK_OVERLAY (overlay
, 0);
3354 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3356 XSETBUFFER (buffer
, current_buffer
);
3357 CHECK_BUFFER (buffer
, 3);
3360 && ! EQ (Fmarker_buffer (beg
), buffer
))
3361 error ("Marker points into wrong buffer");
3363 && ! EQ (Fmarker_buffer (end
), buffer
))
3364 error ("Marker points into wrong buffer");
3366 CHECK_NUMBER_COERCE_MARKER (beg
, 1);
3367 CHECK_NUMBER_COERCE_MARKER (end
, 1);
3369 if (XINT (beg
) == XINT (end
) && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
3370 return Fdelete_overlay (overlay
);
3372 if (XINT (beg
) > XINT (end
))
3375 temp
= beg
; beg
= end
; end
= temp
;
3378 specbind (Qinhibit_quit
, Qt
);
3380 obuffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3381 b
= XBUFFER (buffer
);
3382 ob
= BUFFERP (obuffer
) ? XBUFFER (obuffer
) : (struct buffer
*) 0;
3384 /* If the overlay has changed buffers, do a thorough redisplay. */
3385 if (!EQ (buffer
, obuffer
))
3387 /* Redisplay where the overlay was. */
3388 if (!NILP (obuffer
))
3393 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3394 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3396 modify_overlay (ob
, o_beg
, o_end
);
3399 /* Redisplay where the overlay is going to be. */
3400 modify_overlay (b
, XINT (beg
), XINT (end
));
3403 /* Redisplay the area the overlay has just left, or just enclosed. */
3407 o_beg
= OVERLAY_POSITION (OVERLAY_START (overlay
));
3408 o_end
= OVERLAY_POSITION (OVERLAY_END (overlay
));
3410 if (o_beg
== XINT (beg
))
3411 modify_overlay (b
, o_end
, XINT (end
));
3412 else if (o_end
== XINT (end
))
3413 modify_overlay (b
, o_beg
, XINT (beg
));
3416 if (XINT (beg
) < o_beg
) o_beg
= XINT (beg
);
3417 if (XINT (end
) > o_end
) o_end
= XINT (end
);
3418 modify_overlay (b
, o_beg
, o_end
);
3422 if (!NILP (obuffer
))
3424 ob
->overlays_before
= Fdelq (overlay
, ob
->overlays_before
);
3425 ob
->overlays_after
= Fdelq (overlay
, ob
->overlays_after
);
3428 Fset_marker (OVERLAY_START (overlay
), beg
, buffer
);
3429 Fset_marker (OVERLAY_END (overlay
), end
, buffer
);
3431 /* Put the overlay on the wrong list. */
3432 end
= OVERLAY_END (overlay
);
3433 if (OVERLAY_POSITION (end
) < XINT (b
->overlay_center
))
3434 b
->overlays_after
= Fcons (overlay
, b
->overlays_after
);
3436 b
->overlays_before
= Fcons (overlay
, b
->overlays_before
);
3438 /* This puts it in the right list, and in the right order. */
3439 recenter_overlay_lists (b
, XINT (b
->overlay_center
));
3441 return unbind_to (count
, overlay
);
3444 DEFUN ("delete-overlay", Fdelete_overlay
, Sdelete_overlay
, 1, 1, 0,
3445 "Delete the overlay OVERLAY from its buffer.")
3447 Lisp_Object overlay
;
3451 int count
= specpdl_ptr
- specpdl
;
3453 CHECK_OVERLAY (overlay
, 0);
3455 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3459 b
= XBUFFER (buffer
);
3461 specbind (Qinhibit_quit
, Qt
);
3463 b
->overlays_before
= Fdelq (overlay
, b
->overlays_before
);
3464 b
->overlays_after
= Fdelq (overlay
, b
->overlays_after
);
3467 marker_position (OVERLAY_START (overlay
)),
3468 marker_position (OVERLAY_END (overlay
)));
3470 Fset_marker (OVERLAY_START (overlay
), Qnil
, Qnil
);
3471 Fset_marker (OVERLAY_END (overlay
), Qnil
, Qnil
);
3473 return unbind_to (count
, Qnil
);
3476 /* Overlay dissection functions. */
3478 DEFUN ("overlay-start", Foverlay_start
, Soverlay_start
, 1, 1, 0,
3479 "Return the position at which OVERLAY starts.")
3481 Lisp_Object overlay
;
3483 CHECK_OVERLAY (overlay
, 0);
3485 return (Fmarker_position (OVERLAY_START (overlay
)));
3488 DEFUN ("overlay-end", Foverlay_end
, Soverlay_end
, 1, 1, 0,
3489 "Return the position at which OVERLAY ends.")
3491 Lisp_Object overlay
;
3493 CHECK_OVERLAY (overlay
, 0);
3495 return (Fmarker_position (OVERLAY_END (overlay
)));
3498 DEFUN ("overlay-buffer", Foverlay_buffer
, Soverlay_buffer
, 1, 1, 0,
3499 "Return the buffer OVERLAY belongs to.")
3501 Lisp_Object overlay
;
3503 CHECK_OVERLAY (overlay
, 0);
3505 return Fmarker_buffer (OVERLAY_START (overlay
));
3508 DEFUN ("overlay-properties", Foverlay_properties
, Soverlay_properties
, 1, 1, 0,
3509 "Return a list of the properties on OVERLAY.\n\
3510 This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\
3513 Lisp_Object overlay
;
3515 CHECK_OVERLAY (overlay
, 0);
3517 return Fcopy_sequence (XOVERLAY (overlay
)->plist
);
3521 DEFUN ("overlays-at", Foverlays_at
, Soverlays_at
, 1, 1, 0,
3522 "Return a list of the overlays that contain position POS.")
3527 Lisp_Object
*overlay_vec
;
3531 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3534 /* We can't use alloca here because overlays_at can call xrealloc. */
3535 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3537 /* Put all the overlays we want in a vector in overlay_vec.
3538 Store the length in len. */
3539 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3540 (int *) 0, (int *) 0, 0);
3542 /* Make a list of them all. */
3543 result
= Flist (noverlays
, overlay_vec
);
3545 xfree (overlay_vec
);
3549 DEFUN ("overlays-in", Foverlays_in
, Soverlays_in
, 2, 2, 0,
3550 "Return a list of the overlays that overlap the region BEG ... END.\n\
3551 Overlap means that at least one character is contained within the overlay\n\
3552 and also contained within the specified region.\n\
3553 Empty overlays are included in the result if they are located at BEG\n\
3554 or between BEG and END.")
3556 Lisp_Object beg
, end
;
3559 Lisp_Object
*overlay_vec
;
3563 CHECK_NUMBER_COERCE_MARKER (beg
, 0);
3564 CHECK_NUMBER_COERCE_MARKER (end
, 0);
3567 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3569 /* Put all the overlays we want in a vector in overlay_vec.
3570 Store the length in len. */
3571 noverlays
= overlays_in (XINT (beg
), XINT (end
), 1, &overlay_vec
, &len
,
3572 (int *) 0, (int *) 0);
3574 /* Make a list of them all. */
3575 result
= Flist (noverlays
, overlay_vec
);
3577 xfree (overlay_vec
);
3581 DEFUN ("next-overlay-change", Fnext_overlay_change
, Snext_overlay_change
,
3583 "Return the next position after POS where an overlay starts or ends.\n\
3584 If there are no more overlay boundaries after POS, return (point-max).")
3590 Lisp_Object
*overlay_vec
;
3594 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3597 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3599 /* Put all the overlays we want in a vector in overlay_vec.
3600 Store the length in len.
3601 endpos gets the position where the next overlay starts. */
3602 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3603 &endpos
, (int *) 0, 1);
3605 /* If any of these overlays ends before endpos,
3606 use its ending point instead. */
3607 for (i
= 0; i
< noverlays
; i
++)
3612 oend
= OVERLAY_END (overlay_vec
[i
]);
3613 oendpos
= OVERLAY_POSITION (oend
);
3614 if (oendpos
< endpos
)
3618 xfree (overlay_vec
);
3619 return make_number (endpos
);
3622 DEFUN ("previous-overlay-change", Fprevious_overlay_change
,
3623 Sprevious_overlay_change
, 1, 1, 0,
3624 "Return the previous position before POS where an overlay starts or ends.\n\
3625 If there are no more overlay boundaries before POS, return (point-min).")
3631 Lisp_Object
*overlay_vec
;
3634 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3636 /* At beginning of buffer, we know the answer;
3637 avoid bug subtracting 1 below. */
3638 if (XINT (pos
) == BEGV
)
3642 overlay_vec
= (Lisp_Object
*) xmalloc (len
* sizeof (Lisp_Object
));
3644 /* Put all the overlays we want in a vector in overlay_vec.
3645 Store the length in len.
3646 prevpos gets the position of the previous change. */
3647 noverlays
= overlays_at (XINT (pos
), 1, &overlay_vec
, &len
,
3648 (int *) 0, &prevpos
, 1);
3650 xfree (overlay_vec
);
3651 return make_number (prevpos
);
3654 /* These functions are for debugging overlays. */
3656 DEFUN ("overlay-lists", Foverlay_lists
, Soverlay_lists
, 0, 0, 0,
3657 "Return a pair of lists giving all the overlays of the current buffer.\n\
3658 The car has all the overlays before the overlay center;\n\
3659 the cdr has all the overlays after the overlay center.\n\
3660 Recentering overlays moves overlays between these lists.\n\
3661 The lists you get are copies, so that changing them has no effect.\n\
3662 However, the overlays you get are the real objects that the buffer uses.")
3665 Lisp_Object before
, after
;
3666 before
= current_buffer
->overlays_before
;
3668 before
= Fcopy_sequence (before
);
3669 after
= current_buffer
->overlays_after
;
3671 after
= Fcopy_sequence (after
);
3673 return Fcons (before
, after
);
3676 DEFUN ("overlay-recenter", Foverlay_recenter
, Soverlay_recenter
, 1, 1, 0,
3677 "Recenter the overlays of the current buffer around position POS.")
3681 CHECK_NUMBER_COERCE_MARKER (pos
, 0);
3683 recenter_overlay_lists (current_buffer
, XINT (pos
));
3687 DEFUN ("overlay-get", Foverlay_get
, Soverlay_get
, 2, 2, 0,
3688 "Get the property of overlay OVERLAY with property name PROP.")
3690 Lisp_Object overlay
, prop
;
3692 Lisp_Object plist
, fallback
;
3694 CHECK_OVERLAY (overlay
, 0);
3698 for (plist
= XOVERLAY (overlay
)->plist
;
3699 CONSP (plist
) && CONSP (XCDR (plist
));
3700 plist
= XCDR (XCDR (plist
)))
3702 if (EQ (XCAR (plist
), prop
))
3703 return XCAR (XCDR (plist
));
3704 else if (EQ (XCAR (plist
), Qcategory
))
3707 tem
= Fcar (Fcdr (plist
));
3709 fallback
= Fget (tem
, prop
);
3716 DEFUN ("overlay-put", Foverlay_put
, Soverlay_put
, 3, 3, 0,
3717 "Set one property of overlay OVERLAY: give property PROP value VALUE.")
3718 (overlay
, prop
, value
)
3719 Lisp_Object overlay
, prop
, value
;
3721 Lisp_Object tail
, buffer
;
3724 CHECK_OVERLAY (overlay
, 0);
3726 buffer
= Fmarker_buffer (OVERLAY_START (overlay
));
3728 for (tail
= XOVERLAY (overlay
)->plist
;
3729 CONSP (tail
) && CONSP (XCDR (tail
));
3730 tail
= XCDR (XCDR (tail
)))
3731 if (EQ (XCAR (tail
), prop
))
3733 changed
= !EQ (XCAR (XCDR (tail
)), value
);
3734 XCAR (XCDR (tail
)) = value
;
3737 /* It wasn't in the list, so add it to the front. */
3738 changed
= !NILP (value
);
3739 XOVERLAY (overlay
)->plist
3740 = Fcons (prop
, Fcons (value
, XOVERLAY (overlay
)->plist
));
3742 if (! NILP (buffer
))
3745 modify_overlay (XBUFFER (buffer
),
3746 marker_position (OVERLAY_START (overlay
)),
3747 marker_position (OVERLAY_END (overlay
)));
3748 if (EQ (prop
, Qevaporate
) && ! NILP (value
)
3749 && (OVERLAY_POSITION (OVERLAY_START (overlay
))
3750 == OVERLAY_POSITION (OVERLAY_END (overlay
))))
3751 Fdelete_overlay (overlay
);
3756 /* Subroutine of report_overlay_modification. */
3758 /* Lisp vector holding overlay hook functions to call.
3759 Vector elements come in pairs.
3760 Each even-index element is a list of hook functions.
3761 The following odd-index element is the overlay they came from.
3763 Before the buffer change, we fill in this vector
3764 as we call overlay hook functions.
3765 After the buffer change, we get the functions to call from this vector.
3766 This way we always call the same functions before and after the change. */
3767 static Lisp_Object last_overlay_modification_hooks
;
3769 /* Number of elements actually used in last_overlay_modification_hooks. */
3770 static int last_overlay_modification_hooks_used
;
3772 /* Add one functionlist/overlay pair
3773 to the end of last_overlay_modification_hooks. */
3776 add_overlay_mod_hooklist (functionlist
, overlay
)
3777 Lisp_Object functionlist
, overlay
;
3779 int oldsize
= XVECTOR (last_overlay_modification_hooks
)->size
;
3781 if (last_overlay_modification_hooks_used
== oldsize
)
3784 old
= last_overlay_modification_hooks
;
3785 last_overlay_modification_hooks
3786 = Fmake_vector (make_number (oldsize
* 2), Qnil
);
3787 bcopy (XVECTOR (old
)->contents
,
3788 XVECTOR (last_overlay_modification_hooks
)->contents
,
3789 sizeof (Lisp_Object
) * oldsize
);
3791 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = functionlist
;
3792 XVECTOR (last_overlay_modification_hooks
)->contents
[last_overlay_modification_hooks_used
++] = overlay
;
3795 /* Run the modification-hooks of overlays that include
3796 any part of the text in START to END.
3797 If this change is an insertion, also
3798 run the insert-before-hooks of overlay starting at END,
3799 and the insert-after-hooks of overlay ending at START.
3801 This is called both before and after the modification.
3802 AFTER is nonzero when we call after the modification.
3804 ARG1, ARG2, ARG3 are arguments to pass to the hook functions.
3805 When AFTER is nonzero, they are the start position,
3806 the position after the inserted new text,
3807 and the length of deleted or replaced old text. */
3810 report_overlay_modification (start
, end
, after
, arg1
, arg2
, arg3
)
3811 Lisp_Object start
, end
;
3813 Lisp_Object arg1
, arg2
, arg3
;
3815 Lisp_Object prop
, overlay
, tail
;
3816 /* 1 if this change is an insertion. */
3817 int insertion
= (after
? XFASTINT (arg3
) == 0 : EQ (start
, end
));
3819 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
, gcpro5
;
3823 GCPRO5 (overlay
, tail
, arg1
, arg2
, arg3
);
3827 /* Call the functions recorded in last_overlay_modification_hooks
3828 rather than scanning the overlays again.
3829 First copy the vector contents, in case some of these hooks
3830 do subsequent modification of the buffer. */
3831 int size
= last_overlay_modification_hooks_used
;
3832 Lisp_Object
*copy
= (Lisp_Object
*) alloca (size
* sizeof (Lisp_Object
));
3835 bcopy (XVECTOR (last_overlay_modification_hooks
)->contents
,
3836 copy
, size
* sizeof (Lisp_Object
));
3838 gcpro1
.nvars
= size
;
3840 for (i
= 0; i
< size
;)
3842 Lisp_Object prop
, overlay
;
3844 overlay
= copy
[i
++];
3845 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3851 /* We are being called before a change.
3852 Scan the overlays to find the functions to call. */
3853 last_overlay_modification_hooks_used
= 0;
3855 for (tail
= current_buffer
->overlays_before
;
3859 int startpos
, endpos
;
3860 Lisp_Object ostart
, oend
;
3862 overlay
= XCAR (tail
);
3864 ostart
= OVERLAY_START (overlay
);
3865 oend
= OVERLAY_END (overlay
);
3866 endpos
= OVERLAY_POSITION (oend
);
3867 if (XFASTINT (start
) > endpos
)
3869 startpos
= OVERLAY_POSITION (ostart
);
3870 if (insertion
&& (XFASTINT (start
) == startpos
3871 || XFASTINT (end
) == startpos
))
3873 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3876 /* Copy TAIL in case the hook recenters the overlay lists. */
3878 tail
= Fcopy_sequence (tail
);
3880 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3883 if (insertion
&& (XFASTINT (start
) == endpos
3884 || XFASTINT (end
) == endpos
))
3886 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3890 tail
= Fcopy_sequence (tail
);
3892 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3895 /* Test for intersecting intervals. This does the right thing
3896 for both insertion and deletion. */
3897 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3899 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3903 tail
= Fcopy_sequence (tail
);
3905 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3911 for (tail
= current_buffer
->overlays_after
;
3915 int startpos
, endpos
;
3916 Lisp_Object ostart
, oend
;
3918 overlay
= XCAR (tail
);
3920 ostart
= OVERLAY_START (overlay
);
3921 oend
= OVERLAY_END (overlay
);
3922 startpos
= OVERLAY_POSITION (ostart
);
3923 endpos
= OVERLAY_POSITION (oend
);
3924 if (XFASTINT (end
) < startpos
)
3926 if (insertion
&& (XFASTINT (start
) == startpos
3927 || XFASTINT (end
) == startpos
))
3929 prop
= Foverlay_get (overlay
, Qinsert_in_front_hooks
);
3933 tail
= Fcopy_sequence (tail
);
3935 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3938 if (insertion
&& (XFASTINT (start
) == endpos
3939 || XFASTINT (end
) == endpos
))
3941 prop
= Foverlay_get (overlay
, Qinsert_behind_hooks
);
3945 tail
= Fcopy_sequence (tail
);
3947 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3950 /* Test for intersecting intervals. This does the right thing
3951 for both insertion and deletion. */
3952 if (XFASTINT (end
) > startpos
&& XFASTINT (start
) < endpos
)
3954 prop
= Foverlay_get (overlay
, Qmodification_hooks
);
3958 tail
= Fcopy_sequence (tail
);
3960 call_overlay_mod_hooks (prop
, overlay
, after
, arg1
, arg2
, arg3
);
3969 call_overlay_mod_hooks (list
, overlay
, after
, arg1
, arg2
, arg3
)
3970 Lisp_Object list
, overlay
;
3972 Lisp_Object arg1
, arg2
, arg3
;
3974 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
3976 GCPRO4 (list
, arg1
, arg2
, arg3
);
3978 add_overlay_mod_hooklist (list
, overlay
);
3980 while (!NILP (list
))
3983 call4 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
);
3985 call5 (Fcar (list
), overlay
, after
? Qt
: Qnil
, arg1
, arg2
, arg3
);
3991 /* Delete any zero-sized overlays at position POS, if the `evaporate'
3994 evaporate_overlays (pos
)
3997 Lisp_Object tail
, overlay
, hit_list
;
4000 if (pos
<= XFASTINT (current_buffer
->overlay_center
))
4001 for (tail
= current_buffer
->overlays_before
; CONSP (tail
);
4005 overlay
= XCAR (tail
);
4006 endpos
= OVERLAY_POSITION (OVERLAY_END (overlay
));
4009 if (endpos
== pos
&& OVERLAY_POSITION (OVERLAY_START (overlay
)) == pos
4010 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4011 hit_list
= Fcons (overlay
, hit_list
);
4014 for (tail
= current_buffer
->overlays_after
; CONSP (tail
);
4018 overlay
= XCAR (tail
);
4019 startpos
= OVERLAY_POSITION (OVERLAY_START (overlay
));
4022 if (startpos
== pos
&& OVERLAY_POSITION (OVERLAY_END (overlay
)) == pos
4023 && ! NILP (Foverlay_get (overlay
, Qevaporate
)))
4024 hit_list
= Fcons (overlay
, hit_list
);
4026 for (; CONSP (hit_list
); hit_list
= XCDR (hit_list
))
4027 Fdelete_overlay (XCAR (hit_list
));
4030 /* Somebody has tried to store a value with an unacceptable type
4031 in the slot with offset OFFSET. */
4034 buffer_slot_type_mismatch (offset
)
4040 switch (XINT (PER_BUFFER_TYPE (offset
)))
4043 type_name
= "integers";
4047 type_name
= "strings";
4051 type_name
= "symbols";
4058 sym
= PER_BUFFER_SYMBOL (offset
);
4059 error ("Only %s should be stored in the buffer-local variable %s",
4060 type_name
, XSYMBOL (sym
)->name
->data
);
4064 /***********************************************************************
4065 Allocation with mmap
4066 ***********************************************************************/
4068 #ifdef USE_MMAP_FOR_BUFFERS
4070 #include <sys/types.h>
4071 #include <sys/mman.h>
4074 #ifdef MAP_ANONYMOUS
4075 #define MAP_ANON MAP_ANONYMOUS
4091 /* Memory is allocated in regions which are mapped using mmap(2).
4092 The current implementation lets the system select mapped
4093 addresses; we're not using MAP_FIXED in general, except when
4094 trying to enlarge regions.
4096 Each mapped region starts with a mmap_region structure, the user
4097 area starts after that structure, aligned to MEM_ALIGN.
4099 +-----------------------+
4100 | struct mmap_info + |
4102 +-----------------------+
4106 +-----------------------+ */
4110 /* User-specified size. */
4111 size_t nbytes_specified
;
4113 /* Number of bytes mapped */
4114 size_t nbytes_mapped
;
4116 /* Pointer to the location holding the address of the memory
4117 allocated with the mmap'd block. The variable actually points
4118 after this structure. */
4121 /* Next and previous in list of all mmap'd regions. */
4122 struct mmap_region
*next
, *prev
;
4125 /* Doubly-linked list of mmap'd regions. */
4127 static struct mmap_region
*mmap_regions
;
4129 /* File descriptor for mmap. If we don't have anonymous mapping,
4130 /dev/zero will be opened on it. */
4134 /* Temporary storage for mmap_set_vars, see there. */
4136 static struct mmap_region
*mmap_regions_1
;
4137 static int mmap_fd_1
;
4139 /* Page size on this system. */
4141 static int mmap_page_size
;
4143 /* 1 means mmap has been intialized. */
4145 static int mmap_initialized_p
;
4147 /* Value is X rounded up to the next multiple of N. */
4149 #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N))
4151 /* Size of mmap_region structure plus padding. */
4153 #define MMAP_REGION_STRUCT_SIZE \
4154 ROUND (sizeof (struct mmap_region), MEM_ALIGN)
4156 /* Given a pointer P to the start of the user-visible part of a mapped
4157 region, return a pointer to the start of the region. */
4159 #define MMAP_REGION(P) \
4160 ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE))
4162 /* Given a pointer P to the start of a mapped region, return a pointer
4163 to the start of the user-visible part of the region. */
4165 #define MMAP_USER_AREA(P) \
4166 ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE))
4168 #define MEM_ALIGN sizeof (double)
4170 /* Function prototypes. */
4172 static int mmap_free_1
P_ ((struct mmap_region
*));
4173 static int mmap_enlarge
P_ ((struct mmap_region
*, int));
4174 static struct mmap_region
*mmap_find
P_ ((POINTER_TYPE
*, POINTER_TYPE
*));
4175 static POINTER_TYPE
*mmap_alloc
P_ ((POINTER_TYPE
**, size_t));
4176 static POINTER_TYPE
*mmap_realloc
P_ ((POINTER_TYPE
**, size_t));
4177 static void mmap_free
P_ ((POINTER_TYPE
**ptr
));
4178 static void mmap_init
P_ ((void));
4181 /* Return a region overlapping address range START...END, or null if
4182 none. END is not including, i.e. the last byte in the range
4185 static struct mmap_region
*
4186 mmap_find (start
, end
)
4187 POINTER_TYPE
*start
, *end
;
4189 struct mmap_region
*r
;
4190 char *s
= (char *) start
, *e
= (char *) end
;
4192 for (r
= mmap_regions
; r
; r
= r
->next
)
4194 char *rstart
= (char *) r
;
4195 char *rend
= rstart
+ r
->nbytes_mapped
;
4197 if (/* First byte of range, i.e. START, in this region? */
4198 (s
>= rstart
&& s
< rend
)
4199 /* Last byte of range, i.e. END - 1, in this region? */
4200 || (e
> rstart
&& e
<= rend
)
4201 /* First byte of this region in the range? */
4202 || (rstart
>= s
&& rstart
< e
)
4203 /* Last byte of this region in the range? */
4204 || (rend
> s
&& rend
<= e
))
4212 /* Unmap a region. P is a pointer to the start of the user-araa of
4213 the region. Value is non-zero if successful. */
4217 struct mmap_region
*r
;
4220 r
->next
->prev
= r
->prev
;
4222 r
->prev
->next
= r
->next
;
4224 mmap_regions
= r
->next
;
4226 if (munmap (r
, r
->nbytes_mapped
) == -1)
4228 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4236 /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R.
4237 Value is non-zero if successful. */
4240 mmap_enlarge (r
, npages
)
4241 struct mmap_region
*r
;
4244 char *region_end
= (char *) r
+ r
->nbytes_mapped
;
4250 /* Unmap pages at the end of the region. */
4251 nbytes
= - npages
* mmap_page_size
;
4252 if (munmap (region_end
- nbytes
, nbytes
) == -1)
4253 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4256 r
->nbytes_mapped
-= nbytes
;
4260 else if (npages
> 0)
4262 struct mmap_region
*r2
;
4264 nbytes
= npages
* mmap_page_size
;
4266 /* Try to map additional pages at the end of the region. We
4267 cannot do this if the address range is already occupied by
4268 something else because mmap deletes any previous mapping.
4269 I'm not sure this is worth doing, let's see. */
4270 r2
= mmap_find (region_end
, region_end
+ nbytes
);
4275 p
= mmap (region_end
, nbytes
, PROT_READ
| PROT_WRITE
,
4276 MAP_ANON
| MAP_PRIVATE
| MAP_FIXED
, mmap_fd
, 0);
4277 if (p
== MAP_FAILED
)
4278 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4279 else if (p
!= (POINTER_TYPE
*) region_end
)
4281 /* Kernels are free to choose a different address. In
4282 that case, unmap what we've mapped above; we have
4284 if (munmap (p
, nbytes
) == -1)
4285 fprintf (stderr
, "munmap: %s\n", emacs_strerror (errno
));
4289 r
->nbytes_mapped
+= nbytes
;
4299 /* Set or reset variables holding references to mapped regions. If
4300 RESTORE_P is zero, set all variables to null. If RESTORE_P is
4301 non-zero, set all variables to the start of the user-areas
4304 This function is called from Fdump_emacs to ensure that the dumped
4305 Emacs doesn't contain references to memory that won't be mapped
4306 when Emacs starts. */
4309 mmap_set_vars (restore_p
)
4312 struct mmap_region
*r
;
4316 mmap_regions
= mmap_regions_1
;
4317 mmap_fd
= mmap_fd_1
;
4318 for (r
= mmap_regions
; r
; r
= r
->next
)
4319 *r
->var
= MMAP_USER_AREA (r
);
4323 for (r
= mmap_regions
; r
; r
= r
->next
)
4325 mmap_regions_1
= mmap_regions
;
4326 mmap_regions
= NULL
;
4327 mmap_fd_1
= mmap_fd
;
4333 /* Allocate a block of storage large enough to hold NBYTES bytes of
4334 data. A pointer to the data is returned in *VAR. VAR is thus the
4335 address of some variable which will use the data area.
4337 The allocation of 0 bytes is valid.
4339 If we can't allocate the necessary memory, set *VAR to null, and
4342 static POINTER_TYPE
*
4343 mmap_alloc (var
, nbytes
)
4352 map
= ROUND (nbytes
+ MMAP_REGION_STRUCT_SIZE
, mmap_page_size
);
4353 p
= mmap (NULL
, map
, PROT_READ
| PROT_WRITE
, MAP_ANON
| MAP_PRIVATE
,
4356 if (p
== MAP_FAILED
)
4358 if (errno
!= ENOMEM
)
4359 fprintf (stderr
, "mmap: %s\n", emacs_strerror (errno
));
4364 struct mmap_region
*r
= (struct mmap_region
*) p
;
4366 r
->nbytes_specified
= nbytes
;
4367 r
->nbytes_mapped
= map
;
4370 r
->next
= mmap_regions
;
4375 p
= MMAP_USER_AREA (p
);
4382 /* Given a pointer at address VAR to data allocated with mmap_alloc,
4383 resize it to size NBYTES. Change *VAR to reflect the new block,
4384 and return this value. If more memory cannot be allocated, then
4385 leave *VAR unchanged, and return null. */
4387 static POINTER_TYPE
*
4388 mmap_realloc (var
, nbytes
)
4392 POINTER_TYPE
*result
;
4397 result
= mmap_alloc (var
, nbytes
);
4398 else if (nbytes
== 0)
4401 result
= mmap_alloc (var
, nbytes
);
4405 struct mmap_region
*r
= MMAP_REGION (*var
);
4406 size_t room
= r
->nbytes_mapped
- MMAP_REGION_STRUCT_SIZE
;
4411 POINTER_TYPE
*old_ptr
= *var
;
4413 /* Try to map additional pages at the end of the region.
4414 If that fails, allocate a new region, copy data
4415 from the old region, then free it. */
4416 if (mmap_enlarge (r
, (ROUND (nbytes
- room
, mmap_page_size
)
4419 r
->nbytes_specified
= nbytes
;
4420 *var
= result
= old_ptr
;
4422 else if (mmap_alloc (var
, nbytes
))
4424 bcopy (old_ptr
, *var
, r
->nbytes_specified
);
4425 mmap_free_1 (MMAP_REGION (old_ptr
));
4427 r
= MMAP_REGION (result
);
4428 r
->nbytes_specified
= nbytes
;
4436 else if (room
- nbytes
>= mmap_page_size
)
4438 /* Shrinking by at least a page. Let's give some
4439 memory back to the system. */
4440 mmap_enlarge (r
, - (room
- nbytes
) / mmap_page_size
);
4442 r
->nbytes_specified
= nbytes
;
4446 /* Leave it alone. */
4448 r
->nbytes_specified
= nbytes
;
4456 /* Free a block of relocatable storage whose data is pointed to by
4457 PTR. Store 0 in *PTR to show there's no block allocated. */
4467 mmap_free_1 (MMAP_REGION (*var
));
4473 /* Perform necessary intializations for the use of mmap. */
4479 /* The value of mmap_fd is initially 0 in temacs, and -1
4480 in a dumped Emacs. */
4483 /* No anonymous mmap -- we need the file descriptor. */
4484 mmap_fd
= open ("/dev/zero", O_RDONLY
);
4486 fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno
));
4488 #endif /* MAP_ANON == 0 */
4490 if (mmap_initialized_p
)
4492 mmap_initialized_p
= 1;
4498 mmap_page_size
= getpagesize ();
4501 #endif /* USE_MMAP_FOR_BUFFERS */
4505 /***********************************************************************
4506 Buffer-text Allocation
4507 ***********************************************************************/
4510 extern POINTER_TYPE
*r_alloc
P_ ((POINTER_TYPE
**, size_t));
4511 extern POINTER_TYPE
*r_re_alloc
P_ ((POINTER_TYPE
**, size_t));
4512 extern void r_alloc_free
P_ ((POINTER_TYPE
**ptr
));
4513 #endif /* REL_ALLOC */
4516 /* Allocate NBYTES bytes for buffer B's text buffer. */
4519 alloc_buffer_text (b
, nbytes
)
4526 #if defined USE_MMAP_FOR_BUFFERS
4527 p
= mmap_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4528 #elif defined REL_ALLOC
4529 p
= r_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4531 p
= xmalloc (nbytes
);
4540 b
->text
->beg
= (unsigned char *) p
;
4544 /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means
4548 enlarge_buffer_text (b
, delta
)
4553 size_t nbytes
= (BUF_Z_BYTE (b
) - BUF_BEG_BYTE (b
) + BUF_GAP_SIZE (b
) + 1
4556 #if defined USE_MMAP_FOR_BUFFERS
4557 p
= mmap_realloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4558 #elif defined REL_ALLOC
4559 p
= r_re_alloc ((POINTER_TYPE
**) &b
->text
->beg
, nbytes
);
4561 p
= xrealloc (b
->text
->beg
, nbytes
);
4570 BUF_BEG_ADDR (b
) = (unsigned char *) p
;
4575 /* Free buffer B's text buffer. */
4578 free_buffer_text (b
)
4583 #if defined USE_MMAP_FOR_BUFFERS
4584 mmap_free ((POINTER_TYPE
**) &b
->text
->beg
);
4585 #elif defined REL_ALLOC
4586 r_alloc_free ((POINTER_TYPE
**) &b
->text
->beg
);
4588 xfree (b
->text
->beg
);
4591 BUF_BEG_ADDR (b
) = NULL
;
4597 /***********************************************************************
4599 ***********************************************************************/
4606 bzero (buffer_permanent_local_flags
, sizeof buffer_permanent_local_flags
);
4608 /* Make sure all markable slots in buffer_defaults
4609 are initialized reasonably, so mark_buffer won't choke. */
4610 reset_buffer (&buffer_defaults
);
4611 reset_buffer_local_variables (&buffer_defaults
, 1);
4612 reset_buffer (&buffer_local_symbols
);
4613 reset_buffer_local_variables (&buffer_local_symbols
, 1);
4614 /* Prevent GC from getting confused. */
4615 buffer_defaults
.text
= &buffer_defaults
.own_text
;
4616 buffer_local_symbols
.text
= &buffer_local_symbols
.own_text
;
4617 BUF_INTERVALS (&buffer_defaults
) = 0;
4618 BUF_INTERVALS (&buffer_local_symbols
) = 0;
4619 XSETBUFFER (Vbuffer_defaults
, &buffer_defaults
);
4620 XSETBUFFER (Vbuffer_local_symbols
, &buffer_local_symbols
);
4622 /* Set up the default values of various buffer slots. */
4623 /* Must do these before making the first buffer! */
4625 /* real setup is done in bindings.el */
4626 buffer_defaults
.mode_line_format
= build_string ("%-");
4627 buffer_defaults
.header_line_format
= Qnil
;
4628 buffer_defaults
.abbrev_mode
= Qnil
;
4629 buffer_defaults
.overwrite_mode
= Qnil
;
4630 buffer_defaults
.case_fold_search
= Qt
;
4631 buffer_defaults
.auto_fill_function
= Qnil
;
4632 buffer_defaults
.selective_display
= Qnil
;
4634 buffer_defaults
.selective_display_ellipses
= Qt
;
4636 buffer_defaults
.abbrev_table
= Qnil
;
4637 buffer_defaults
.display_table
= Qnil
;
4638 buffer_defaults
.undo_list
= Qnil
;
4639 buffer_defaults
.mark_active
= Qnil
;
4640 buffer_defaults
.file_format
= Qnil
;
4641 buffer_defaults
.overlays_before
= Qnil
;
4642 buffer_defaults
.overlays_after
= Qnil
;
4643 XSETFASTINT (buffer_defaults
.overlay_center
, BEG
);
4645 XSETFASTINT (buffer_defaults
.tab_width
, 8);
4646 buffer_defaults
.truncate_lines
= Qnil
;
4647 buffer_defaults
.ctl_arrow
= Qt
;
4648 buffer_defaults
.direction_reversed
= Qnil
;
4649 buffer_defaults
.cursor_type
= Qt
;
4650 buffer_defaults
.extra_line_spacing
= Qnil
;
4653 buffer_defaults
.buffer_file_type
= Qnil
; /* TEXT */
4655 buffer_defaults
.enable_multibyte_characters
= Qt
;
4656 buffer_defaults
.buffer_file_coding_system
= Qnil
;
4657 XSETFASTINT (buffer_defaults
.fill_column
, 70);
4658 XSETFASTINT (buffer_defaults
.left_margin
, 0);
4659 buffer_defaults
.cache_long_line_scans
= Qnil
;
4660 buffer_defaults
.file_truename
= Qnil
;
4661 XSETFASTINT (buffer_defaults
.display_count
, 0);
4662 buffer_defaults
.indicate_empty_lines
= Qnil
;
4663 buffer_defaults
.scroll_up_aggressively
= Qnil
;
4664 buffer_defaults
.scroll_down_aggressively
= Qnil
;
4665 buffer_defaults
.display_time
= Qnil
;
4667 /* Assign the local-flags to the slots that have default values.
4668 The local flag is a bit that is used in the buffer
4669 to say that it has its own local value for the slot.
4670 The local flag bits are in the local_var_flags slot of the buffer. */
4672 /* Nothing can work if this isn't true */
4673 if (sizeof (EMACS_INT
) != sizeof (Lisp_Object
)) abort ();
4675 /* 0 means not a lisp var, -1 means always local, else mask */
4676 bzero (&buffer_local_flags
, sizeof buffer_local_flags
);
4677 XSETINT (buffer_local_flags
.filename
, -1);
4678 XSETINT (buffer_local_flags
.directory
, -1);
4679 XSETINT (buffer_local_flags
.backed_up
, -1);
4680 XSETINT (buffer_local_flags
.save_length
, -1);
4681 XSETINT (buffer_local_flags
.auto_save_file_name
, -1);
4682 XSETINT (buffer_local_flags
.read_only
, -1);
4683 XSETINT (buffer_local_flags
.major_mode
, -1);
4684 XSETINT (buffer_local_flags
.mode_name
, -1);
4685 XSETINT (buffer_local_flags
.undo_list
, -1);
4686 XSETINT (buffer_local_flags
.mark_active
, -1);
4687 XSETINT (buffer_local_flags
.point_before_scroll
, -1);
4688 XSETINT (buffer_local_flags
.file_truename
, -1);
4689 XSETINT (buffer_local_flags
.invisibility_spec
, -1);
4690 XSETINT (buffer_local_flags
.file_format
, -1);
4691 XSETINT (buffer_local_flags
.display_count
, -1);
4692 XSETINT (buffer_local_flags
.display_time
, -1);
4693 XSETINT (buffer_local_flags
.enable_multibyte_characters
, -1);
4696 XSETFASTINT (buffer_local_flags
.mode_line_format
, idx
); ++idx
;
4697 XSETFASTINT (buffer_local_flags
.abbrev_mode
, idx
); ++idx
;
4698 XSETFASTINT (buffer_local_flags
.overwrite_mode
, idx
); ++idx
;
4699 XSETFASTINT (buffer_local_flags
.case_fold_search
, idx
); ++idx
;
4700 XSETFASTINT (buffer_local_flags
.auto_fill_function
, idx
); ++idx
;
4701 XSETFASTINT (buffer_local_flags
.selective_display
, idx
); ++idx
;
4703 XSETFASTINT (buffer_local_flags
.selective_display_ellipses
, idx
); ++idx
;
4705 XSETFASTINT (buffer_local_flags
.tab_width
, idx
); ++idx
;
4706 XSETFASTINT (buffer_local_flags
.truncate_lines
, idx
); ++idx
;
4707 XSETFASTINT (buffer_local_flags
.ctl_arrow
, idx
); ++idx
;
4708 XSETFASTINT (buffer_local_flags
.fill_column
, idx
); ++idx
;
4709 XSETFASTINT (buffer_local_flags
.left_margin
, idx
); ++idx
;
4710 XSETFASTINT (buffer_local_flags
.abbrev_table
, idx
); ++idx
;
4711 XSETFASTINT (buffer_local_flags
.display_table
, idx
); ++idx
;
4713 XSETFASTINT (buffer_local_flags
.buffer_file_type
, idx
);
4714 /* Make this one a permanent local. */
4715 buffer_permanent_local_flags
[idx
++] = 1;
4717 XSETFASTINT (buffer_local_flags
.syntax_table
, idx
); ++idx
;
4718 XSETFASTINT (buffer_local_flags
.cache_long_line_scans
, idx
); ++idx
;
4719 XSETFASTINT (buffer_local_flags
.category_table
, idx
); ++idx
;
4720 XSETFASTINT (buffer_local_flags
.direction_reversed
, idx
); ++idx
;
4721 XSETFASTINT (buffer_local_flags
.buffer_file_coding_system
, idx
);
4722 /* Make this one a permanent local. */
4723 buffer_permanent_local_flags
[idx
++] = 1;
4724 XSETFASTINT (buffer_local_flags
.left_margin_width
, idx
); ++idx
;
4725 XSETFASTINT (buffer_local_flags
.right_margin_width
, idx
); ++idx
;
4726 XSETFASTINT (buffer_local_flags
.indicate_empty_lines
, idx
); ++idx
;
4727 XSETFASTINT (buffer_local_flags
.scroll_up_aggressively
, idx
); ++idx
;
4728 XSETFASTINT (buffer_local_flags
.scroll_down_aggressively
, idx
); ++idx
;
4729 XSETFASTINT (buffer_local_flags
.header_line_format
, idx
); ++idx
;
4730 XSETFASTINT (buffer_local_flags
.cursor_type
, idx
); ++idx
;
4731 XSETFASTINT (buffer_local_flags
.extra_line_spacing
, idx
); ++idx
;
4733 /* Need more room? */
4734 if (idx
>= MAX_PER_BUFFER_VARS
)
4736 last_per_buffer_idx
= idx
;
4738 Vbuffer_alist
= Qnil
;
4742 QSFundamental
= build_string ("Fundamental");
4744 Qfundamental_mode
= intern ("fundamental-mode");
4745 buffer_defaults
.major_mode
= Qfundamental_mode
;
4747 Qmode_class
= intern ("mode-class");
4749 Qprotected_field
= intern ("protected-field");
4751 Qpermanent_local
= intern ("permanent-local");
4753 Qkill_buffer_hook
= intern ("kill-buffer-hook");
4755 Vprin1_to_string_buffer
= Fget_buffer_create (build_string (" prin1"));
4757 /* super-magic invisible buffer */
4758 Vbuffer_alist
= Qnil
;
4760 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4762 inhibit_modification_hooks
= 0;
4768 char buf
[MAXPATHLEN
+ 1];
4770 struct stat dotstat
, pwdstat
;
4774 #ifdef USE_MMAP_FOR_BUFFERS
4776 /* When using the ralloc implementation based on mmap(2), buffer
4777 text pointers will have been set to null in the dumped Emacs.
4781 for (b
= all_buffers
; b
; b
= b
->next
)
4782 if (b
->text
->beg
== NULL
)
4783 enlarge_buffer_text (b
, 0);
4785 #endif /* USE_MMAP_FOR_BUFFERS */
4787 Fset_buffer (Fget_buffer_create (build_string ("*scratch*")));
4788 if (NILP (buffer_defaults
.enable_multibyte_characters
))
4789 Fset_buffer_multibyte (Qnil
);
4791 /* If PWD is accurate, use it instead of calling getwd. This is faster
4792 when PWD is right, and may avoid a fatal error. */
4793 if ((pwd
= getenv ("PWD")) != 0
4794 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
4795 && stat (pwd
, &pwdstat
) == 0
4796 && stat (".", &dotstat
) == 0
4797 && dotstat
.st_ino
== pwdstat
.st_ino
4798 && dotstat
.st_dev
== pwdstat
.st_dev
4799 && strlen (pwd
) < MAXPATHLEN
)
4802 else if (getcwd (buf
, MAXPATHLEN
+1) == 0)
4803 fatal ("`getcwd' failed: %s\n", strerror (errno
));
4805 else if (getwd (buf
) == 0)
4806 fatal ("`getwd' failed: %s\n", buf
);
4810 /* Maybe this should really use some standard subroutine
4811 whose definition is filename syntax dependent. */
4813 if (!(IS_DIRECTORY_SEP (buf
[rc
- 1])))
4815 buf
[rc
] = DIRECTORY_SEP
;
4818 #endif /* not VMS */
4820 current_buffer
->directory
= build_string (buf
);
4822 /* Add /: to the front of the name
4823 if it would otherwise be treated as magic. */
4824 temp
= Ffind_file_name_handler (current_buffer
->directory
, Qt
);
4826 /* If the default dir is just /, TEMP is non-nil
4827 because of the ange-ftp completion handler.
4828 However, it is not necessary to turn / into /:/.
4829 So avoid doing that. */
4830 && strcmp ("/", XSTRING (current_buffer
->directory
)->data
))
4831 current_buffer
->directory
4832 = concat2 (build_string ("/:"), current_buffer
->directory
);
4834 temp
= get_minibuffer (0);
4835 XBUFFER (temp
)->directory
= current_buffer
->directory
;
4838 /* initialize the buffer routines */
4842 staticpro (&last_overlay_modification_hooks
);
4843 last_overlay_modification_hooks
4844 = Fmake_vector (make_number (10), Qnil
);
4846 staticpro (&Vbuffer_defaults
);
4847 staticpro (&Vbuffer_local_symbols
);
4848 staticpro (&Qfundamental_mode
);
4849 staticpro (&Qmode_class
);
4850 staticpro (&QSFundamental
);
4851 staticpro (&Vbuffer_alist
);
4852 staticpro (&Qprotected_field
);
4853 staticpro (&Qpermanent_local
);
4854 staticpro (&Qkill_buffer_hook
);
4855 Qoverlayp
= intern ("overlayp");
4856 staticpro (&Qoverlayp
);
4857 Qevaporate
= intern ("evaporate");
4858 staticpro (&Qevaporate
);
4859 Qmodification_hooks
= intern ("modification-hooks");
4860 staticpro (&Qmodification_hooks
);
4861 Qinsert_in_front_hooks
= intern ("insert-in-front-hooks");
4862 staticpro (&Qinsert_in_front_hooks
);
4863 Qinsert_behind_hooks
= intern ("insert-behind-hooks");
4864 staticpro (&Qinsert_behind_hooks
);
4865 Qget_file_buffer
= intern ("get-file-buffer");
4866 staticpro (&Qget_file_buffer
);
4867 Qpriority
= intern ("priority");
4868 staticpro (&Qpriority
);
4869 Qwindow
= intern ("window");
4870 staticpro (&Qwindow
);
4871 Qbefore_string
= intern ("before-string");
4872 staticpro (&Qbefore_string
);
4873 Qafter_string
= intern ("after-string");
4874 staticpro (&Qafter_string
);
4875 Qfirst_change_hook
= intern ("first-change-hook");
4876 staticpro (&Qfirst_change_hook
);
4877 Qbefore_change_functions
= intern ("before-change-functions");
4878 staticpro (&Qbefore_change_functions
);
4879 Qafter_change_functions
= intern ("after-change-functions");
4880 staticpro (&Qafter_change_functions
);
4882 Fput (Qprotected_field
, Qerror_conditions
,
4883 Fcons (Qprotected_field
, Fcons (Qerror
, Qnil
)));
4884 Fput (Qprotected_field
, Qerror_message
,
4885 build_string ("Attempt to modify a protected field"));
4887 /* All these use DEFVAR_LISP_NOPRO because the slots in
4888 buffer_defaults will all be marked via Vbuffer_defaults. */
4890 DEFVAR_LISP_NOPRO ("default-mode-line-format",
4891 &buffer_defaults
.mode_line_format
,
4892 "Default value of `mode-line-format' for buffers that don't override it.\n\
4893 This is the same as (default-value 'mode-line-format).");
4895 DEFVAR_LISP_NOPRO ("default-header-line-format",
4896 &buffer_defaults
.header_line_format
,
4897 "Default value of `header-line-format' for buffers that don't override it.\n\
4898 This is the same as (default-value 'header-line-format).");
4900 DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults
.cursor_type
,
4901 "Default value of `cursor-type' for buffers that don't override it.\n\
4902 This is the same as (default-value 'cursor-type).");
4904 DEFVAR_LISP_NOPRO ("default-line-spacing",
4905 &buffer_defaults
.extra_line_spacing
,
4906 "Default value of `line-spacing' for buffers that don't override it.\n\
4907 This is the same as (default-value 'line-spacing).");
4909 DEFVAR_LISP_NOPRO ("default-abbrev-mode",
4910 &buffer_defaults
.abbrev_mode
,
4911 "Default value of `abbrev-mode' for buffers that do not override it.\n\
4912 This is the same as (default-value 'abbrev-mode).");
4914 DEFVAR_LISP_NOPRO ("default-ctl-arrow",
4915 &buffer_defaults
.ctl_arrow
,
4916 "Default value of `ctl-arrow' for buffers that do not override it.\n\
4917 This is the same as (default-value 'ctl-arrow).");
4919 DEFVAR_LISP_NOPRO ("default-direction-reversed",
4920 &buffer_defaults
.direction_reversed
,
4921 "Default value of `direction_reversed' for buffers that do not override it.\n\
4922 This is the same as (default-value 'direction-reversed).");
4924 DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters",
4925 &buffer_defaults
.enable_multibyte_characters
,
4926 "*Default value of `enable-multibyte-characters' for buffers not overriding it.\n\
4927 This is the same as (default-value 'enable-multibyte-characters).");
4929 DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system",
4930 &buffer_defaults
.buffer_file_coding_system
,
4931 "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\
4932 This is the same as (default-value 'buffer-file-coding-system).");
4934 DEFVAR_LISP_NOPRO ("default-truncate-lines",
4935 &buffer_defaults
.truncate_lines
,
4936 "Default value of `truncate-lines' for buffers that do not override it.\n\
4937 This is the same as (default-value 'truncate-lines).");
4939 DEFVAR_LISP_NOPRO ("default-fill-column",
4940 &buffer_defaults
.fill_column
,
4941 "Default value of `fill-column' for buffers that do not override it.\n\
4942 This is the same as (default-value 'fill-column).");
4944 DEFVAR_LISP_NOPRO ("default-left-margin",
4945 &buffer_defaults
.left_margin
,
4946 "Default value of `left-margin' for buffers that do not override it.\n\
4947 This is the same as (default-value 'left-margin).");
4949 DEFVAR_LISP_NOPRO ("default-tab-width",
4950 &buffer_defaults
.tab_width
,
4951 "Default value of `tab-width' for buffers that do not override it.\n\
4952 This is the same as (default-value 'tab-width).");
4954 DEFVAR_LISP_NOPRO ("default-case-fold-search",
4955 &buffer_defaults
.case_fold_search
,
4956 "Default value of `case-fold-search' for buffers that don't override it.\n\
4957 This is the same as (default-value 'case-fold-search).");
4960 DEFVAR_LISP_NOPRO ("default-buffer-file-type",
4961 &buffer_defaults
.buffer_file_type
,
4962 "Default file type for buffers that do not override it.\n\
4963 This is the same as (default-value 'buffer-file-type).\n\
4964 The file type is nil for text, t for binary.");
4967 DEFVAR_LISP_NOPRO ("default-left-margin-width",
4968 &buffer_defaults
.left_margin_width
,
4969 "Default value of `left-margin-width' for buffers that don't override it.\n\
4970 This is the same as (default-value 'left-margin-width).");
4972 DEFVAR_LISP_NOPRO ("default-right-margin-width",
4973 &buffer_defaults
.right_margin_width
,
4974 "Default value of `right_margin_width' for buffers that don't override it.\n\
4975 This is the same as (default-value 'right-margin-width).");
4977 DEFVAR_LISP_NOPRO ("default-indicate-empty-lines",
4978 &buffer_defaults
.indicate_empty_lines
,
4979 "Default value of `indicate-empty-lines' for buffers that don't override it.\n\
4980 This is the same as (default-value 'indicate-empty-lines).");
4982 DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively",
4983 &buffer_defaults
.scroll_up_aggressively
,
4984 "Default value of `scroll-up-aggressively' for buffers that\n\
4985 don't override it. This is the same as (default-value\n\
4986 'scroll-up-aggressively).");
4988 DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively",
4989 &buffer_defaults
.scroll_down_aggressively
,
4990 "Default value of `scroll-down-aggressively' for buffers that\n\
4991 don't override it. This is the same as (default-value\n\
4992 'scroll-down-aggressively).");
4994 DEFVAR_PER_BUFFER ("header-line-format",
4995 ¤t_buffer
->header_line_format
,
4997 "Analogous to `mode-line-format', but for a mode line displayed\n\
4998 at the top of windows.");
5000 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer
->mode_line_format
,
5003 /* This doc string is too long for cpp; cpp dies if it isn't in a comment.
5004 But make-docfile finds it!
5005 DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format,
5007 "Template for displaying mode line for current buffer.\n\
5008 Each buffer has its own value of this variable.\n\
5009 Value may be nil, a string, a symbol or a list or cons cell.\n\
5010 A value of nil means don't display a mode line.\n\
5011 For a symbol, its value is used (but it is ignored if t or nil).\n\
5012 A string appearing directly as the value of a symbol is processed verbatim\n\
5013 in that the %-constructs below are not recognized.\n\
5014 For a list of the form `(:eval FORM)', FORM is evaluated and the result\n\
5015 is used as a mode line element.\n\
5016 For a list whose car is a symbol, the symbol's value is taken,\n\
5017 and if that is non-nil, the cadr of the list is processed recursively.\n\
5018 Otherwise, the caddr of the list (if there is one) is processed.\n\
5019 For a list whose car is a string or list, each element is processed\n\
5020 recursively and the results are effectively concatenated.\n\
5021 For a list whose car is an integer, the cdr of the list is processed\n\
5022 and padded (if the number is positive) or truncated (if negative)\n\
5023 to the width specified by that number.\n\
5024 A string is printed verbatim in the mode line except for %-constructs:\n\
5025 (%-constructs are allowed when the string is the entire mode-line-format\n\
5026 or when it is found in a cons-cell or a list)\n\
5027 %b -- print buffer name. %f -- print visited file name.\n\
5028 %F -- print frame name.\n\
5029 %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\
5030 %& is like %*, but ignore read-only-ness.\n\
5031 % means buffer is read-only and * means it is modified.\n\
5032 For a modified read-only buffer, %* gives % and %+ gives *.\n\
5033 %s -- print process status. %l -- print the current line number.\n\
5034 %c -- print the current column number (this makes editing slower).\n\
5035 To make the column number update correctly in all cases,\n\
5036 `column-number-mode' must be non-nil.\n\
5037 %p -- print percent of buffer above top of window, or Top, Bot or All.\n\
5038 %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\
5039 or print Bottom or All.\n\
5040 %m -- print the mode name.\n\
5041 %n -- print Narrow if appropriate.\n\
5042 %z -- print mnemonics of buffer, terminal, and keyboard coding systems.\n\
5043 %Z -- like %z, but including the end-of-line format.\n\
5044 %[ -- print one [ for each recursive editing level. %] similar.\n\
5045 %% -- print %. %- -- print infinitely many dashes.\n\
5046 Decimal digits after the % specify field width to which to pad.");
5049 DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults
.major_mode
,
5050 "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\
5051 nil here means use current buffer's major mode.");
5053 DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer
->major_mode
,
5054 make_number (Lisp_Symbol
),
5055 "Symbol for current buffer's major mode.");
5057 DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer
->mode_name
,
5058 make_number (Lisp_String
),
5059 "Pretty name of current buffer's major mode (a string).");
5061 DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer
->abbrev_mode
, Qnil
,
5062 "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\
5063 Automatically becomes buffer-local when set in any fashion.");
5065 DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer
->case_fold_search
,
5067 "*Non-nil if searches and matches should ignore case.\n\
5068 Automatically becomes buffer-local when set in any fashion.");
5070 DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer
->fill_column
,
5071 make_number (Lisp_Int
),
5072 "*Column beyond which automatic line-wrapping should happen.\n\
5073 Automatically becomes buffer-local when set in any fashion.");
5075 DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer
->left_margin
,
5076 make_number (Lisp_Int
),
5077 "*Column for the default indent-line-function to indent to.\n\
5078 Linefeed indents to this column in Fundamental mode.\n\
5079 Automatically becomes buffer-local when set in any fashion.");
5081 DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer
->tab_width
,
5082 make_number (Lisp_Int
),
5083 "*Distance between tab stops (for display of tab characters), in columns.\n\
5084 Automatically becomes buffer-local when set in any fashion.");
5086 DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer
->ctl_arrow
, Qnil
,
5087 "*Non-nil means display control chars with uparrow.\n\
5088 A value of nil means use backslash and octal digits.\n\
5089 Automatically becomes buffer-local when set in any fashion.\n\
5090 This variable does not apply to characters whose display is specified\n\
5091 in the current display table (if there is one).");
5093 DEFVAR_PER_BUFFER ("enable-multibyte-characters",
5094 ¤t_buffer
->enable_multibyte_characters
,
5096 "Non-nil means the buffer contents are regarded as multi-byte characters.\n\
5097 Otherwise they are regarded as unibyte. This affects the display,\n\
5098 file I/O and the behavior of various editing commands.\n\
5100 This variable is buffer-local but you cannot set it directly;\n\
5101 use the function `set-buffer-multibyte' to change a buffer's representation.\n\
5102 Changing its default value with `setq-default' is supported.\n\
5103 See also variable `default-enable-multibyte-characters' and Info node\n\
5104 `(elisp)Text Representations'.");
5106 DEFVAR_PER_BUFFER ("buffer-file-coding-system",
5107 ¤t_buffer
->buffer_file_coding_system
, Qnil
,
5108 "Coding system to be used for encoding the buffer contents on saving.\n\
5109 This variable applies to saving the buffer, and also to `write-region'\n\
5110 and other functions that use `write-region'.\n\
5111 It does not apply to sending output to subprocesses, however.\n\
5113 If this is nil, the buffer is saved without any code conversion\n\
5114 unless some coding system is specified in `file-coding-system-alist'\n\
5115 for the buffer file.\n\
5117 The variable `coding-system-for-write', if non-nil, overrides this variable.\n\
5119 This variable is never applied to a way of decoding\n\
5120 a file while reading it.");
5122 DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer
->direction_reversed
,
5124 "*Non-nil means lines in the buffer are displayed right to left.");
5126 DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer
->truncate_lines
, Qnil
,
5127 "*Non-nil means do not display continuation lines;\n\
5128 give each line of text one screen line.\n\
5129 Automatically becomes buffer-local when set in any fashion.\n\
5131 Note that this is overridden by the variable\n\
5132 `truncate-partial-width-windows' if that variable is non-nil\n\
5133 and this buffer is not full-frame width.");
5136 DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer
->buffer_file_type
,
5138 "Non-nil if the visited file is a binary file.\n\
5139 This variable is meaningful on MS-DOG and Windows NT.\n\
5140 On those systems, it is automatically local in every buffer.\n\
5141 On other systems, this variable is normally always nil.");
5144 DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer
->directory
,
5145 make_number (Lisp_String
),
5146 "Name of default directory of current buffer. Should end with slash.\n\
5147 Each buffer has its own value of this variable.");
5149 DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer
->auto_fill_function
,
5151 "Function called (if non-nil) to perform auto-fill.\n\
5152 It is called after self-inserting any character specified in\n\
5153 the `auto-fill-chars' table.\n\
5154 Each buffer has its own value of this variable.\n\
5155 NOTE: This variable is not a hook;\n\
5156 its value may not be a list of functions.");
5158 DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer
->filename
,
5159 make_number (Lisp_String
),
5160 "Name of file visited in current buffer, or nil if not visiting a file.\n\
5161 Each buffer has its own value of this variable.");
5163 DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer
->file_truename
,
5164 make_number (Lisp_String
),
5165 "Abbreviated truename of file visited in current buffer, or nil if none.\n\
5166 The truename of a file is calculated by `file-truename'\n\
5167 and then abbreviated with `abbreviate-file-name'.\n\
5168 Each buffer has its own value of this variable.");
5170 DEFVAR_PER_BUFFER ("buffer-auto-save-file-name",
5171 ¤t_buffer
->auto_save_file_name
,
5172 make_number (Lisp_String
),
5173 "Name of file for auto-saving current buffer,\n\
5174 or nil if buffer should not be auto-saved.\n\
5175 Each buffer has its own value of this variable.");
5177 DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer
->read_only
, Qnil
,
5178 "Non-nil if this buffer is read-only.\n\
5179 Each buffer has its own value of this variable.");
5181 DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer
->backed_up
, Qnil
,
5182 "Non-nil if this buffer's file has been backed up.\n\
5183 Backing up is done before the first time the file is saved.\n\
5184 Each buffer has its own value of this variable.");
5186 DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer
->save_length
,
5187 make_number (Lisp_Int
),
5188 "Length of current buffer when last read in, saved or auto-saved.\n\
5190 Each buffer has its own value of this variable.");
5192 DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer
->selective_display
,
5194 "Non-nil enables selective display:\n\
5195 Integer N as value means display only lines\n\
5196 that start with less than n columns of space.\n\
5197 A value of t means, after a ^M, all the rest of the line is invisible.\n\
5198 Then ^M's in the file are written into files as newlines.\n\n\
5199 Automatically becomes buffer-local when set in any fashion.");
5202 DEFVAR_PER_BUFFER ("selective-display-ellipses",
5203 ¤t_buffer
->selective_display_ellipses
,
5205 "t means display ... on previous line when a line is invisible.\n\
5206 Automatically becomes buffer-local when set in any fashion.");
5209 DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer
->overwrite_mode
, Qnil
,
5210 "Non-nil if self-insertion should replace existing text.\n\
5211 The value should be one of `overwrite-mode-textual',\n\
5212 `overwrite-mode-binary', or nil.\n\
5213 If it is `overwrite-mode-textual', self-insertion still\n\
5214 inserts at the end of a line, and inserts when point is before a tab,\n\
5215 until the tab is filled in.\n\
5216 If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\
5217 Automatically becomes buffer-local when set in any fashion.");
5219 #if 0 /* The doc string is too long for some compilers,
5220 but make-docfile can find it in this comment. */
5221 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5223 "Display table that controls display of the contents of current buffer.\n\
5224 Automatically becomes buffer-local when set in any fashion.\n\
5225 The display table is a char-table created with `make-display-table'.\n\
5226 The ordinary char-table elements control how to display each possible text\n\
5227 character. Each value should be a vector of characters or nil;\n\
5228 nil means display the character in the default fashion.\n\
5229 There are six extra slots to control the display of\n\
5230 the end of a truncated screen line (extra-slot 0, a single character);\n\
5231 the end of a continued line (extra-slot 1, a single character);\n\
5232 the escape character used to display character codes in octal\n\
5233 (extra-slot 2, a single character);\n\
5234 the character used as an arrow for control characters (extra-slot 3,\n\
5235 a single character);\n\
5236 the decoration indicating the presence of invisible lines (extra-slot 4,\n\
5237 a vector of characters);\n\
5238 the character used to draw the border between side-by-side windows\n\
5239 (extra-slot 5, a single character).\n\
5240 See also the functions `display-table-slot' and `set-display-table-slot'.\n\
5241 If this variable is nil, the value of `standard-display-table' is used.\n\
5242 Each window can have its own, overriding display table.");
5244 DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer
->display_table
,
5247 DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer
->left_margin_width
,
5249 "*Width of left marginal area for display of a buffer.\n\
5250 Automatically becomes buffer-local when set in any fashion.\n\
5251 A value of nil means no marginal area.");
5253 DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer
->right_margin_width
,
5255 "*Width of right marginal area for display of a buffer.\n\
5256 Automatically becomes buffer-local when set in any fashion.\n\
5257 A value of nil means no marginal area.");
5259 DEFVAR_PER_BUFFER ("indicate-empty-lines",
5260 ¤t_buffer
->indicate_empty_lines
, Qnil
,
5261 "*Visually indicate empty lines after the buffer end.\n\
5262 If non-nil, a bitmap is displayed in the left fringe of a window on\n\
5264 Automatically becomes buffer-local when set in any fashion.\n");
5266 DEFVAR_PER_BUFFER ("scroll-up-aggressively",
5267 ¤t_buffer
->scroll_up_aggressively
, Qnil
,
5268 "*If a number, scroll display up aggressively.\n\
5269 If scrolling a window because point is above the window start, choose\n\
5270 a new window start so that point ends up that fraction of the window's\n\
5271 height from the top of the window.\n\
5272 Automatically becomes buffer-local when set in any fashion.");
5274 DEFVAR_PER_BUFFER ("scroll-down-aggressively",
5275 ¤t_buffer
->scroll_down_aggressively
, Qnil
,
5276 "*If a number, scroll display down aggressively.\n\
5277 If scrolling a window because point is below the window end, choose\n\
5278 a new window start so that point ends up that fraction of the window's\n\
5279 height from the bottom of the window.\n\
5280 Automatically becomes buffer-local when set in any fashion.");
5282 /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol,
5286 DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions
,
5287 "List of functions to call before each text change.\n\
5288 Two arguments are passed to each function: the positions of\n\
5289 the beginning and end of the range of old text to be changed.\n\
5290 \(For an insertion, the beginning and end are at the same place.)\n\
5291 No information is given about the length of the text after the change.\n\
5293 Buffer changes made while executing the `before-change-functions'\n\
5294 don't call any before-change or after-change functions.\n\
5295 That's because these variables are temporarily set to nil.\n\
5296 As a result, a hook function cannot straightforwardly alter the value of\n\
5297 these variables. See the Emacs Lisp manual for a way of\n\
5298 accomplishing an equivalent result by using other variables.\n\
5300 If an unhandled error happens in running these functions,\n\
5301 the variable's value remains nil. That prevents the error\n\
5302 from happening repeatedly and making Emacs nonfunctional.");
5303 Vbefore_change_functions
= Qnil
;
5305 DEFVAR_LISP ("after-change-functions", &Vafter_change_functions
,
5306 "List of function to call after each text change.\n\
5307 Three arguments are passed to each function: the positions of\n\
5308 the beginning and end of the range of changed text,\n\
5309 and the length in bytes of the pre-change text replaced by that range.\n\
5310 \(For an insertion, the pre-change length is zero;\n\
5311 for a deletion, that length is the number of bytes deleted,\n\
5312 and the post-change beginning and end are at the same place.)\n\
5314 Buffer changes made while executing the `after-change-functions'\n\
5315 don't call any before-change or after-change functions.\n\
5316 That's because these variables are temporarily set to nil.\n\
5317 As a result, a hook function cannot straightforwardly alter the value of\n\
5318 these variables. See the Emacs Lisp manual for a way of\n\
5319 accomplishing an equivalent result by using other variables.\n\
5321 If an unhandled error happens in running these functions,\n\
5322 the variable's value remains nil. That prevents the error\n\
5323 from happening repeatedly and making Emacs nonfunctional.");
5324 Vafter_change_functions
= Qnil
;
5326 DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook
,
5327 "A list of functions to call before changing a buffer which is unmodified.\n\
5328 The functions are run using the `run-hooks' function.");
5329 Vfirst_change_hook
= Qnil
;
5331 #if 0 /* The doc string is too long for some compilers,
5332 but make-docfile can find it in this comment. */
5333 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5334 "List of undo entries in current buffer.\n\
5335 This variable is always local in all buffers.\n\
5336 Recent changes come first; older changes follow newer.\n\
5338 An entry (BEG . END) represents an insertion which begins at\n\
5339 position BEG and ends at position END.\n\
5341 An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\
5342 from (abs POSITION). If POSITION is positive, point was at the front\n\
5343 of the text being deleted; if negative, point was at the end.\n\
5345 An entry (t HIGH . LOW) indicates that the buffer previously had\n\
5346 \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\
5347 of the visited file's modification time, as of that time. If the\n\
5348 modification time of the most recent save is different, this entry is\n\
5351 An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\
5352 was modified between BEG and END. PROPERTY is the property name,\n\
5353 and VALUE is the old value.\n\
5355 An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\
5356 was adjusted in position by the offset DISTANCE (an integer).\n\
5358 An entry of the form POSITION indicates that point was at the buffer\n\
5359 location given by the integer. Undoing an entry of this form places\n\
5360 point at POSITION.\n\
5362 nil marks undo boundaries. The undo command treats the changes\n\
5363 between two undo boundaries as a single step to be undone.\n\
5365 If the value of the variable is t, undo information is not recorded.");
5367 DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer
->undo_list
, Qnil
,
5370 DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer
->mark_active
, Qnil
,
5371 "Non-nil means the mark and region are currently active in this buffer.\n\
5372 Automatically local in all buffers.");
5374 DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer
->cache_long_line_scans
, Qnil
,
5375 "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\
5376 This variable is buffer-local, in all buffers.\n\
5378 Normally, the line-motion functions work by scanning the buffer for\n\
5379 newlines. Columnar operations (like move-to-column and\n\
5380 compute-motion) also work by scanning the buffer, summing character\n\
5381 widths as they go. This works well for ordinary text, but if the\n\
5382 buffer's lines are very long (say, more than 500 characters), these\n\
5383 motion functions will take longer to execute. Emacs may also take\n\
5384 longer to update the display.\n\
5386 If cache-long-line-scans is non-nil, these motion functions cache the\n\
5387 results of their scans, and consult the cache to avoid rescanning\n\
5388 regions of the buffer until the text is modified. The caches are most\n\
5389 beneficial when they prevent the most searching---that is, when the\n\
5390 buffer contains long lines and large regions of characters with the\n\
5391 same, fixed screen width.\n\
5393 When cache-long-line-scans is non-nil, processing short lines will\n\
5394 become slightly slower (because of the overhead of consulting the\n\
5395 cache), and the caches will use memory roughly proportional to the\n\
5396 number of newlines and characters whose screen width varies.\n\
5398 The caches require no explicit maintenance; their accuracy is\n\
5399 maintained internally by the Emacs primitives. Enabling or disabling\n\
5400 the cache should not affect the behavior of any of the motion\n\
5401 functions; it should only affect their performance.");
5403 DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer
->point_before_scroll
, Qnil
,
5404 "Value of point before the last series of scroll operations, or nil.\n\
5405 This variable is always local in all buffers.");
5407 DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer
->file_format
, Qnil
,
5408 "List of formats to use when saving this buffer.\n\
5409 This variable is always local in all buffers.\n\
5410 Formats are defined by `format-alist'. This variable is\n\
5411 set when a file is visited. Automatically local in all buffers.");
5413 DEFVAR_PER_BUFFER ("buffer-invisibility-spec",
5414 ¤t_buffer
->invisibility_spec
, Qnil
,
5415 "Invisibility spec of this buffer.\n\
5416 This variable is always local in all buffers.\n\
5417 The default is t, which means that text is invisible\n\
5418 if it has a non-nil `invisible' property.\n\
5419 If the value is a list, a text character is invisible if its `invisible'\n\
5420 property is an element in that list.\n\
5421 If an element is a cons cell of the form (PROP . ELLIPSIS),\n\
5422 then characters with property value PROP are invisible,\n\
5423 and they have an ellipsis as well if ELLIPSIS is non-nil.");
5425 DEFVAR_PER_BUFFER ("buffer-display-count",
5426 ¤t_buffer
->display_count
, Qnil
,
5427 "A number incremented each time this buffer is displayed in a window.\n\
5428 This variable is always local in all buffers.\n\
5429 The function `set-window-buffer increments it.");
5431 DEFVAR_PER_BUFFER ("buffer-display-time",
5432 ¤t_buffer
->display_time
, Qnil
,
5433 "Time stamp updated each time this buffer is displayed in a window.\n\
5434 This variable is always local in all buffers.\n\
5435 The function `set-window-buffer' updates this variable\n\
5436 to the value obtained by calling `current-time'.\n\
5437 If the buffer has never been shown in a window, the value is nil.");
5439 DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode
,
5440 "*Non-nil means deactivate the mark when the buffer contents change.\n\
5441 Non-nil also enables highlighting of the region whenever the mark is active.\n\
5442 The variable `highlight-nonselected-windows' controls whether to highlight\n\
5443 all windows or just the selected window.");
5444 Vtransient_mark_mode
= Qnil
;
5446 DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only
,
5447 "*Non-nil means disregard read-only status of buffers or characters.\n\
5448 If the value is t, disregard `buffer-read-only' and all `read-only'\n\
5449 text properties. If the value is a list, disregard `buffer-read-only'\n\
5450 and disregard a `read-only' text property if the property value\n\
5451 is a member of the list.");
5452 Vinhibit_read_only
= Qnil
;
5454 DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer
->cursor_type
, Qnil
,
5455 "Cursor to use in window displaying this buffer.\n\
5456 Values are interpreted as follows:\n\
5458 t use the cursor specified for the frame\n\
5459 nil don't display a cursor\n\
5460 `bar' display a bar cursor with default width\n\
5461 (bar . WIDTH) display a bar cursor with width WIDTH\n\
5462 others display a box cursor.");
5464 DEFVAR_PER_BUFFER ("line-spacing",
5465 ¤t_buffer
->extra_line_spacing
, Qnil
,
5466 "Additional space to put between lines when displaying a buffer.\n\
5467 The space is measured in pixels, and put below lines on window systems.");
5469 DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions
,
5470 "List of functions called with no args to query before killing a buffer.");
5471 Vkill_buffer_query_functions
= Qnil
;
5473 defsubr (&Sbuffer_live_p
);
5474 defsubr (&Sbuffer_list
);
5475 defsubr (&Sget_buffer
);
5476 defsubr (&Sget_file_buffer
);
5477 defsubr (&Sget_buffer_create
);
5478 defsubr (&Smake_indirect_buffer
);
5479 defsubr (&Sgenerate_new_buffer_name
);
5480 defsubr (&Sbuffer_name
);
5481 /*defsubr (&Sbuffer_number);*/
5482 defsubr (&Sbuffer_file_name
);
5483 defsubr (&Sbuffer_base_buffer
);
5484 defsubr (&Sbuffer_local_variables
);
5485 defsubr (&Sbuffer_modified_p
);
5486 defsubr (&Sset_buffer_modified_p
);
5487 defsubr (&Sbuffer_modified_tick
);
5488 defsubr (&Srename_buffer
);
5489 defsubr (&Sother_buffer
);
5490 defsubr (&Sbuffer_disable_undo
);
5491 defsubr (&Sbuffer_enable_undo
);
5492 defsubr (&Skill_buffer
);
5493 defsubr (&Sset_buffer_major_mode
);
5494 defsubr (&Sswitch_to_buffer
);
5495 defsubr (&Spop_to_buffer
);
5496 defsubr (&Scurrent_buffer
);
5497 defsubr (&Sset_buffer
);
5498 defsubr (&Sbarf_if_buffer_read_only
);
5499 defsubr (&Sbury_buffer
);
5500 defsubr (&Serase_buffer
);
5501 defsubr (&Sset_buffer_multibyte
);
5502 defsubr (&Skill_all_local_variables
);
5504 defsubr (&Soverlayp
);
5505 defsubr (&Smake_overlay
);
5506 defsubr (&Sdelete_overlay
);
5507 defsubr (&Smove_overlay
);
5508 defsubr (&Soverlay_start
);
5509 defsubr (&Soverlay_end
);
5510 defsubr (&Soverlay_buffer
);
5511 defsubr (&Soverlay_properties
);
5512 defsubr (&Soverlays_at
);
5513 defsubr (&Soverlays_in
);
5514 defsubr (&Snext_overlay_change
);
5515 defsubr (&Sprevious_overlay_change
);
5516 defsubr (&Soverlay_recenter
);
5517 defsubr (&Soverlay_lists
);
5518 defsubr (&Soverlay_get
);
5519 defsubr (&Soverlay_put
);
5520 defsubr (&Srestore_buffer_modified_p
);
5526 initial_define_key (control_x_map
, 'b', "switch-to-buffer");
5527 initial_define_key (control_x_map
, 'k', "kill-buffer");
5529 /* This must not be in syms_of_buffer, because Qdisabled is not
5530 initialized when that function gets called. */
5531 Fput (intern ("erase-buffer"), Qdisabled
, Qt
);